Corpua

Corpua is one page of health and appearance practices. Not medical advice.

• Same wake time every day, weekends included, within 30 minutes. Treat bedtime as a fixed appointment, within 30 to 45 minutes night to night.show source
• Sleep regularity predicts all-cause mortality better than sleep duration: 20 to 48% lower mortality in the more regular groups.show source
• Anchor your schedule to a wake time that survives the worst day of a normal week, not the best one.
• Keep your usual wake time after a late night out, and move it to local time immediately when crossing time zones and hold it. When ill, sleep more and drop the wake-time rule until you recover.
• Sleeping in on weekends does not repair a short-sleep week. Insulin sensitivity still worsened.show source
• 7 to 9 hours for most adults: about 8 hours in bed, with a sleep efficiency above 85% of that time actually asleep.show source
• Bedroom at 18 to 20°C (65 to 68°F), with breathable bedding and light sleepwear. A cooling mattress cover works when the room itself cannot be cooled.show source
• A warm bath or shower before bed speeds the core temperature drop afterward.show source
• Total darkness: blackout curtains or an eye mask.show source
• Bedroom noise under about 30 dB. Noise-reducing curtains and closed windows first, earplugs next, white or pink noise at the lowest masking volume last.show source
• Bedroom clean, clutter-free and used only for sleep, never for work. Phone and charger live outside it; use a physical alarm clock across the room, and be out of bed within 5 minutes of it.
• Screens off 60 minutes before bed: they mostly hurt by delaying bedtime and keeping you stimulated. Wind down for the last 30 to 60 minutes with no work: 10 minutes of reading, breathing, music, a walk or a conversation, with arguments and hard conversations moved to the morning. Dim the lights 1 to 2 hours before bed: lamps instead of overheads, warm, amber or red light after sunset. Blue-light filters and glasses matter less than dimming and putting the screen away.show source
• No alcohol. It fragments sleep architecture for several nights, not one.
• Bedtime resting heart rate responds to that evening's choices within hours, the fastest feedback of any measure. Log it for 14 nights next to three things: hours since your last meal, last caffeine, any alcohol. Sort by heart rate, change one variable, run 14 more nights.
• Front-load fluids earlier in the day to cut nighttime bathroom trips.
• Get outside within 10 to 30 minutes of waking for 5 to 15 minutes of daylight, longer when overcast; a window does not substitute. Up before sunrise: a 10,000 lux lamp for a few minutes. Midday outdoor light and a few minutes near sunset also support circadian timing.
• Nap early in the day and for under 25 minutes: short naps avoid deep sleep and the grogginess after it, and late naps take from night sleep. Skip naps if they leave you groggy.show source
• Non-sleep deep rest or yoga nidra, 10 to 20 minutes midday, lowers stress, restores focus and partly offsets a short night. It does not replace sleep.
• Back sleeping with the head slightly elevated reduces overnight facial fluid pooling; side sleeping pools fluid on the lower side of the face. Switch straight to back sleeping rather than alternating sides, with pillows on either side to stop the rolling, and never sleep completely flat. Do not trade sleep quality to force a sleeping position.
• Averaging 6 hours or less makes you about 4 times more likely to catch a cold after exposure.show source
• One night without sleep cut muscle protein synthesis by 18%, lowered testosterone by 24%, raised cortisol by 21% and raised next-day anxiety about 27%.show source
• People photographed after a night of sleep deprivation were rated less attractive, less healthy and more tired.show source
• Snoring, gasping or heavy daytime sleepiness: get screened for sleep-disordered breathing. No habit fixes it.show source
• Chronic insomnia: CBT-I is the front-line treatment. As good as medication short-term, better long-term, and it keeps working after it ends. Insomnia is not one condition, so what fixed it once may not fix it the next time.show source
• General insomnia aids, pick up to three: melatonin 0.5 to 2 mg time-release, magnesium threonate, cannabis where legal, orexin antagonists. Others: chamomile, L-theanine, glycine, valerian, lemon balm, diphenhydramine.
• Proposed low-GABA, high-glutamate insomnia: trouble falling and staying asleep, anxiety without cause, racing thoughts, tired but wired, sensory overload, shakiness. Listed aggravators: alcohol or benzodiazepine withdrawal, chronic stress, gluten, dairy, MSG, aspartame. Not a validated diagnosis.
• Low-GABA insomnia supports, pick up to three: magnesium threonate, B6 10 mg during the day, low-dose zinc during the day, lemon balm. Also listed: GABA, taurine, valerian, black seed oil, magnolia bark, skullcap, NAC, agmatine.
• Proposed serotonin 2A insomnia: trouble falling asleep but staying asleep fine, mood swings, rumination, bloating, migraine. Listed supports: sunlight, meditation or prayer, inositol 500 to 3000 mg and chromium 200 to 400 mcg during the day, lithium orotate 1 to 5 mg, niacin 50 to 100 mg, occasional feverfew. Not a validated diagnosis.
• Melatonin 0.5 to 2 mg: real for falling asleep and shifting the body clock, weak for staying asleep. It is not a sedative, retail doses far exceed what the body makes, and claims that it suppresses the adrenals or unbalances hormones are unsupported.show source
• L-theanine 100 to 200 mg, 30 to 60 minutes before bed: small effect, low risk.show source
• Diphenhydramine: tolerance within days, worse sleep architecture, and long-term anticholinergic use carries a dementia association.show source
• Cannabis suppresses REM sleep. Sleep on it feels better than it measures.show source
• Wireless signals and EMF: blinded studies find no effect on sleep.
• Caffeine half-life is 5 to 6 hours and varies by person. Cut off 8 to 10 hours before bed, so nothing after 1pm for an 11pm bedtime. Late caffeine lowers sleep quality even when you can still fall asleep.show source
• Caffeine about 30 minutes before training, at 1 to 3 mg per kg of bodyweight, or before focused work, at 100 to 200 mg. Keep it to pre-training and early in the day, and not before every session: the effect blunts with habitual use, and all-day use keeps cortisol elevated.show source
• Caffeine with L-theanine, about twice as much theanine as caffeine, improved attention and task switching in small trials.show source
• Caffeine taken right after studying improves retention of what you just learned.show source
• Caffeine content: coffee 8 oz about 100 mg, espresso shot about 70 mg, black tea 45 to 75 mg, green tea 40 to 50 mg, energy drink 8 oz about 80 mg, cola 34 to 55 mg, pills 100 to 200 mg.
• Caffeine withdrawal starts 12 to 24 hours after the last dose: headache, fatigue, irritability, poor focus. It fades over days to weeks.
• Habitual caffeine intake does not meaningfully dehydrate you.show source
• Waiting 90 to 120 minutes after waking for the first coffee is popular but weakly supported.
• Resistance training at least twice a week: 15% lower all-cause, 19% lower cardiovascular and 14% lower cancer mortality, peaking at about 30 to 60 minutes a week and declining above that. Strength plus aerobic training: 40% lower all-cause, 46% lower cardiovascular and 28% lower cancer mortality.show source
• Cardiorespiratory fitness predicts mortality as strongly as smoking or diabetes. The least fit had about 5 times the death risk of the most fit.show source
• Regular physical activity: 26 to 31% lower all-cause and 28 to 38% lower cardiovascular mortality, 35 to 42% combining moderate and vigorous work, and a further 21 to 23% lower all-cause mortality at two to four times the minimum vigorous exercise.
• Muscular strength predicts mortality independent of BMI and aerobic fitness, so cardio does not substitute for strength work. The weakest third had 20 to 35% higher risk of dying before 55.show source
• Compound lifts: squat, hinge or deadlift, horizontal press, vertical pull, one loaded carry.
• Take the last set of every lift to within 1 to 2 reps of failure.show source
• Log every set and add load when you hit the top of the rep range: progressive overload without wrecking recovery.
• Follow a written program. Do not redesign it every week.
• Strength focus: 3 to 5 reps, 3 to 5 sets, 3 to 5 exercises, 3 to 5 minutes rest, 3 to 5 days a week.
• Muscle growth: 8 to 12 reps is typical, and 75 to 85% of your one-rep max for 6 to 10 reps is the standard range. Sets of up to 30 reps still work if taken close to failure.show source
• HIIT finisher: 30 seconds sprint, 60 seconds rest, 5 rounds.
• 150 to 200 minutes of zone 2 a week plus about 75 minutes of vigorous work. Zone 2 is the pace where you can still hold a conversation; vigorous is where you cannot. Keep zone 2 that easy and intervals genuinely hard: the middle gets less of both.show source
• About 6 hours a week (3 strength sessions, 3 cardio sessions, plus mobility and balance) is a capability target, not a health minimum; two hard strength sessions capture most of the health return. One layout: 3 strength and 2 endurance sessions for 10 to 12 weeks, then flip to 3 endurance and 2 strength.
• No need to cap sessions at an hour. Weekly hard sets drive muscle growth, not session length.
• Flexibility, balance and mobility work every week. Static stretches held 30 to 90 seconds, after training. Dynamic movement to warm up. Never stretch cold.
• Skip an exercise rather than risk an injury. Strength training cut sports injuries to under a third and overuse injuries by almost half; stretching did not reduce injuries.show source
• Any consistent activity pays, including exercise snacks: 1 to 2 minute bursts of stair climbing or fast walking through the day. When sitting, move for 2 to 3 minutes every half hour, and alternate sitting and standing through the workday.show source
• Hard training earlier in the day is less likely to disturb sleep. Specific windows such as 30 minutes, 3 hours or 11 hours after waking are weakly supported.
• Overtraining raises cortisol and suppresses testosterone only at genuinely excessive volume. Keep rest days.
• Heavy cardio during a cut costs muscle. Keep cardio moderate, 3 to 4 times a week.show source
• Resistance training, weighted vests and jump training raise bone density.show source
• Exercise for depression: effect size g = −0.62 against active controls. Walking or jogging, yoga and strength training all work, higher intensity gives larger effects, and yoga and strength training are the best tolerated.show source
• 8,000 steps a day. The mortality benefit plateaus at 8,000 to 10,000, and walking pace adds nothing beyond total step count.show source
• Walk 5 to 10 minutes after every meal. It blunts the glucose spike better than the same walk at another time.show source
• Ill: stop training until symptoms clear, then resume one step below your last working load.
• Short trip with no gym: drop training rather than improvising a replacement.
• Test any new supplement or pre-workout food well before a competition.
• Body fat is the jawline lever: jaw exercises cannot compensate for fat in the area. Male facial structure typically becomes visible around 9 to 12% body fat, or at higher muscle mass. Cutting from already lean looks drawn, not defined; for a lean, very active person, the lever is usually adding muscle, not losing fat.
• Weigh every morning just after waking, empty stomach, no clothes, and use 7-day averages, never single days. Daily weight swings with sodium, carbohydrate, stress, sleep and digestion.
• Weekly progress photos in the same spot, light, time and poses. Judge by photos and waist, not the scale; waist circumference tracks visceral fat better than bodyweight.show source
• IGF-1 is not a number to maximise: higher circulating IGF-1 is associated with several cancers, so colostrum, arginine or anything else taken to raise it carries that trade-off.
• If coeliac disease is possible, get tested before cutting gluten. The test only works while you are still eating it.
• Symptoms attributed to gluten: bloating, fatigue, brain fog, joint pain, depression, insomnia, neuropathy, frequent urination, cold sensitivity. Listed supports: sunlight, niacin 50 to 250 mg, omega-3, digestive enzymes, B. bifidum.
• Histamine intolerance is uncommon and diagnosed by elimination and reintroduction. Supports taken 30 minutes before a high-histamine meal: vitamin C, quercetin, bromelain. Also listed: DAO enzyme, stinging nettle, black seed oil.
• Probiotic effects are strain-specific and modest, and digestive enzymes, butyrate and sulforaphane are just as context-specific. Daily fermented food beats broad-spectrum capsules, and more strains on the label is not a quality signal.
• Collagen peptides 20 to 30 g a day with vitamin C: small positive trials for skin elasticity. Bone broth, collagen and L-glutamine for repairing the gut wall: unproven.show source
• Take antibiotics only when necessary.
• Detox is not something food or supplements do.
• Water: 2 to 3 litres a day as a rough baseline, scaled to your size, the heat and your activity. Add electrolytes: a pinch of salt, coconut water or an electrolyte mix.
• On waking: water, electrolytes and creatine, sipped rather than downed. Downed fast, much of it is urinated out within hours.
• Plain water without electrolytes does not cause bloating or imbalance at normal intake.
• Measure your sweat rate: weigh yourself before and after a session, towel-dried and unclothed. Each pound lost is about 16 oz of fluid.
• Drink to thirst for most exercise and do not force fluid past it. Plan drinking for long, hot, high-sweat sessions: voluntary drinking replaces only about two-thirds of sweat losses, and losing more than about 2% of bodyweight in sweat degrades performance and heat regulation.
• Replacing large sweat losses with plain water alone risks hyponatremia. 0.3 to 0.7 g of sodium per litre raises thirst and voluntary intake and lowers that risk, and heavy, salty sweaters need more sodium back.
• Heat illness escalates: cramps, then exhaustion (heavy sweating, weakness, nausea, cool clammy skin), then heat stroke (confusion, hot skin, sweating may stop), a medical emergency. Confusion in the heat is the red flag.
• Uniforms and heavy clothing block evaporative cooling. Hydrate and cool down beforehand rather than catching up during.
• Heat acclimatisation takes 10 to 14 days of gradually increasing exposure.
• Antiperspirant on the feet for at least 3 nights before a long hike or march cut blisters from 48% to 21%, but irritated the skin in over half of users.show source
• Athlete's foot: terbinafine cream for 1 week works as well as clotrimazole for 4. Dry between the toes after showering.show source
• Morning urine colour is a rough marker only, and supplements skew it.
• Himalayan and Celtic salt are not physiologically different from table salt; total sodium is what matters. Do not cut sodium entirely.
• Sauna: 15 to 20 minutes at 80 to 90°C (176 to 194°F), 3 to 5 times a week, ideally after training; temperatures used run 80 to 100°C, 5 to 20 minutes per round. Sauna 4 to 7 times a week is associated with about 60% lower cardiovascular and 40% lower all-cause mortality than once a week, with more benefit from longer and more frequent sessions.show source
• Dry sauna has the longest evidence. Infrared and steam lack equivalent data. A hot bath is a partial substitute.
• In a sauna above 90°C, cover your head with a damp cloth and breathe through it.
• Replace water and electrolytes after a sauna.
• Cold plunge: start at 55 to 60°F for 1 to 3 minutes, and get out on a timer, not on feel. About 11 minutes a week in total. Experienced people go into the low 40s°F.
• Neck-deep cold immersion, hands and feet included, beats a cold shower, but a cold shower still works: switch to fully cold for the last 2 to 3 minutes.
• Keep cold immersion away from strength sessions. Straight after lifting it blunts the adaptation.show source
• Cold for raising testosterone or IGF-1, or for turning white fat brown, is overstated in humans.
• Cooling the palms reduces muscle soreness.
• Red and near-infrared light, about 6 minutes a session: evidence is thin outside hair loss.
• Physiological sigh: two inhales through the nose, one long exhale through the mouth, the fastest way to lower arousal in real time. Exhale longer than you inhale to lower heart rate, and inhale longer to raise it; cyclic hyperventilation raises adrenaline and alertness.
• 5 minutes of breathing or meditation after waking. Meditation, yoga, prayer or simply staring at a wall all train attention and calm.
• Time in nature, 10 to 30 minutes several times a week: lower blood pressure, better sleep, better mood.
• Treat stress arousal as fuel. That framing measurably improves performance under it.
• A short stressor such as cold or hard exercise before demanding work raises alertness.
• Small deliberate discomforts, like waiting 15 minutes before eating or taking the stairs, build tolerance for effort.
• Wide-angle, far-distance vision calms the nervous system. Weak evidence.
• Grounding, walking barefoot on grass, has no evidence. The outdoor light and the walk are the useful part.
• Broad-spectrum SPF 30+ every morning, including indoors, since UV passes through ordinary windows; UV-tinted car and home windows block about 99% of it. Reapply every 2 to 3 hours outdoors, with SPF 30 lip balm.
• Most people apply a quarter to half the tested amount of sunscreen, which gives far less protection than the label. Use about a quarter teaspoon for the face and the same for the neck, or two finger-lengths.show source
• Daily sunscreen produced 24% less photoaging over 4.5 years and no measurable skin aging in the daily group. It slows damage rather than reversing it, and prevents the damage clinic treatments try to correct.show source
• Mineral sunscreen (zinc oxide, titanium dioxide) is fine if it gets you wearing it daily. Chemical filters absorb measurably, but harm at those levels has not been shown.
• Get sun early morning and late afternoon. Avoid direct sun at high UV, roughly 10am to 4pm. Use a hat, clothing or a UV umbrella.
• Sunbeds raise melanoma risk about 20%, and about 59% when started before 35.show source
• Self-tanner gives colour without UV, but the tan only equals about SPF 3 and fades within days. Sunscreen still applies.show source
• Oral polypodium for sun redness: weak evidence.
• Retinoid in the evening only, 0.025 to 0.1%, 2 to 3 nights a week to start, building up, and not the same night as salicylic acid while starting. Sunscreen the next morning. If irritated, skip two nights and resume.
• Retinoids: irritation and purging for 1 to 4 weeks, better texture at 2 to 3 months, fine lines and pigment at 6 to 12 months. Tretinoin is the best-evidenced topical for fine lines and sun damage; adapalene 0.1% is an over-the-counter retinoid for acne.
• Salicylic acid for clogged pores and blackheads. Start every other day.
• Benzoyl peroxide for red, inflamed spots. It bleaches fabric, so use white or old pillowcases.
• Azelaic acid 15 to 20% treats acne, redness and the dark marks spots leave.show source
• Clascoterone: prescription topical anti-androgen for acne, approved for males.show source
• Oral antibiotics for acne (doxycycline, minocycline): the shortest course possible, always alongside benzoyl peroxide to limit resistance.show source
• Diluted tea tree oil, sulfur or thyme oil as spot treatments.
• Hands off the face, and keep nails short and clean. Never pick or squeeze spots; it causes scarring.
• Cleanse at most twice a day with lukewarm water and fingertips, not a washcloth, and pat dry. Double cleanse at night after wearing sunscreen, shower after sweating, and keep body soap off the face. Hot water strips natural oils, so avoid long hot showers; pores do not open or close with temperature.
• Moisturise even oily skin. Gel or non-comedogenic formulas for oily skin.
• Keep the skincare routine simple: cleanser, moisturiser, sunscreen, adding one new product at a time. No harsh physical scrubs on acne, and do not over-apply actives (retinol, AHAs, BHAs): it damages the skin barrier and causes irritation.
• Vitamin C serum on clean, dry skin in the morning. It degrades in light, and brown or orange means it has oxidised.
• Hyaluronic acid serum on damp skin only.
• Niacinamide has the best evidence of the serums: barrier, redness and pigment. Niacinamide or kojic acid for pigmentation.show source
• Even skin colour reads as younger and healthier on male faces. A tinted moisturiser or concealer evens out redness and marks.
• Caffeine eye cream for puffiness, twice a day, patted on with the ring finger, never rubbed.
• Cystic acne: see a dermatologist. Prescription treatment beats over-the-counter options, and untreated cystic acne scars.
• Skin avoid list: nicotine, alcohol, processed, fried and high-glycemic food. Acne triggers on top of those: dairy (milk, whey), sugar, gluten, excess B12 or biotin, steroids, iodine, DHEA. Acne from excess B12 shows up as small uniform bumps without blackheads on the forehead, chin, chest and back.
• Acne supports listed: taurine 250 to 500 mg, zinc 5 to 12.5 mg, niacinamide 100 to 250 mg, B5 100 to 250 mg for greasy skin and hair, DIM 100 to 200 mg, green tea extract 200 to 400 mg.
• Silk or bamboo pillowcase, changed every 2 to 3 days if acne-prone and at least weekly otherwise; wash sheets weekly. Separate face and body towels, a clean face towel each wash, and bath towels washed every 3 to 4 days.
• Keep hair off the forehead and shield your face from hair products.
• Apply antiperspirant at night to dry skin, and give it 10 days before judging it. Aluminium antiperspirants have no established link to cancer or Alzheimer's.
• Sweat that soaks through clothes: clinical-strength aluminium chloride first. Prescription glycopyrronium wipes and botox treat underarm hyperhidrosis.
• Use a humidifier in dry climates.
• Clean gua sha tools and rollers after every single use.
• Cortisol face and insulin face are not diagnoses. A genuine rounded moon face from cortisol excess is a medical condition to rule out.
• Clinic treatments: fractional 1927 nm laser for tone, pigment and sun damage. 1550 nm laser for collagen, firmness and acne scars. Microfocused ultrasound and monopolar radiofrequency for laxity along the jaw and neck. Microneedling, with or without radiofrequency, for scars and texture.
• Clinic treatments: redness for days, visible change at 4 to 12 weeks, full effect at 3 to 6 months, fading without maintenance. Laser and energy treatments are typically repeated every 6 to 12 months.
• Pigment complications from laser and energy devices rise with darker skin. Ask about experience with your skin type.
• Hyaluronic acid filler can be dissolved with hyaluronidase. Rare vessel blockage causes skin death or blindness, so choose an injector who keeps hyaluronidase on hand.show source
• Multispectral skin imaging shows UV damage, pores and spots that the eye misses.
• Eye bags from fluid (sodium, poor sleep, allergy, stress, dehydration, screens) respond to less evening sodium, head elevation and cold. Eye bags from fat pads do not respond to cold, creams or retinoids; they need a procedure. Dark circles from pigment need sunscreen and brightening agents; hollowing is volume loss.
• Any product promising results in 7 days is a scam.
• Act on hair loss before it is visible. About a fifth of men have measurable loss by 20, and half the density in an area can go before thinning shows. Treatment protects follicles that are still alive; it does not revive dead ones.
• Finasteride, dutasteride and minoxidil are the only strong hair-loss treatments. Dutasteride 0.5 mg ranked the most effective single treatment, with the largest hair count gain at 24 weeks, and finasteride plus minoxidil the most effective combination in men; combined topical minoxidil-finasteride beat minoxidil alone. Finasteride 1 mg is the best-supported approved oral; topical minoxidil 5% is the best-supported topical.
• Oral minoxidil 5 mg matched twice-daily topical 5% at 24 weeks. Extra body hair and headaches are common, and it needs a cardiovascular check first.show source
• All hair-loss drugs are indefinite. Stopping returns you to your original trajectory within months.
• Finasteride and dutasteride also treat an enlarged prostate. Sexual side effects are the main consideration; with finasteride they occur in a minority and usually reverse on stopping.
• Microneedling plus minoxidil beat minoxidil alone. 0.5 to 1 mm, 1 to 2 times a week, never more than 2 to 3, sterilised with alcohol before and after.show source
• Low-level laser at 650 to 660 nm, 6 to 10 minutes a session: beats sham on hair density, lower frequency beat higher, about 80% respond after a year of use.
• Ketoconazole shampoo 2 to 3 times a week improved density and shaft thickness in small studies, and treats dandruff too.show source
• Massage the scalp for 1 to 2 minutes after applying a hair topical such as minoxidil.
• PRP, oral tadalafil and botox are also used for hair loss. Evidence is thinner.
• A hair transplant makes sense only after medication has stabilised the loss.
• Shedding: check ferritin and vitamin D; iron deficiency is the most common nutritional cause of hair loss. Hair also needs enough protein, omega-3, vitamins C and E, and zinc. Biotin does nothing for hair without a deficiency and can cause spots.show source
• Losing 50 to 100 hairs a day is normal. Telogen effluvium is diffuse shedding 2 to 3 months after illness, crash dieting or major stress, and resolves on its own.show source
• Tight hairstyles cause traction alopecia, which becomes permanent if kept up.
• Heat and bleach break the hair shaft; that is breakage, not hair loss. Do not brush or rub wet hair hard.
• Do not stack several hair products with the same active ingredient.
• The claim that rosemary oil equals minoxidil rests on one weak, unreplicated trial. Always dilute essential oils: 3 to 5 drops in jojoba or almond carrier oil.show source
• Growth-factor and copper-peptide serums have no meaningful evidence.
• Judge any hair treatment at 6 months. The earliest plausible change is 2 to 4 months, and shedding in the first weeks of minoxidil is expected.
• Dandruff and seborrhoeic dermatitis are an immune response to Malassezia yeast, not dryness, so moisturising does nothing. Use ketoconazole, selenium sulfide or zinc pyrithione shampoo, left on a few minutes, twice a week ongoing rather than only during flares: the yeast is a normal skin resident, so it keeps returning, not because of a deeper internal problem.show source
• Dandruff triggers listed: high-fructose foods, refined sugar, gluten, alcohol, iron supplements, lithium, buspirone, some antibiotics.
• Dandruff supports listed: sunlight, a shower filter, niacinamide 50 to 250 mg, riboflavin 10 to 50 mg, EGCG or lactoferrin, zinc 5 to 12.5 mg, probiotics.
• Skipping shampoo does not lower oil production: sebum is hormonal, and going shampoo-free worsens dandruff. The no-shampoo method as described (daily warm rinse with a fingertip scrub, egg rinses in cool water, aloe or herbal rinses, a boar bristle brush, and a few oily weeks) is unsupported.
• Pomade: sleek shine for straight or slightly wavy hair. Water-based rinses out, oil-based lasts.
• Hair wax: medium hold, matte, textured looks. Warm it in your hands 10 seconds first.
• Clay: strong matte hold for fine to medium hair. Apply at the roots for lift.
• Cream: light hold and moisture for curly, wavy or coarse hair. Apply to damp hair.
• Hair gel: strong hold and shine. Use sparingly or it goes crunchy.
• Sea salt spray: texture for wavy and straight hair, applied wet and scrunched. Sea salt rinse: 1 tbsp in a cup of warm water.
• Hair oil on the ends only, never the roots. Leave-in conditioner and masks for dry or damaged hair; alternate protein treatments with moisturising ones, since too many make hair stiff.
• Haircut by face shape: oval suits almost anything except a heavy fringe; round wants height and tight sides, not buzz or bowl cuts; square and other angular faces want softness and texture, such as textured crops or side parts, not boxy shapes; oblong or long faces want volume at the sides, not length; diamond wants width where narrow; heart wants volume low and no very short cuts.
• Receding hairline: textured cuts that draw the eye away. Widow's peak: hide it with a fringe or wear it openly.
• Straight hair suits slick-backs and pompadours. Wavy suits textured cuts. Curly suits short sides with volume on top. Coily suits cropped shapes.
• Unsure about a cut: a medium fade or layered cut, then adjust. Ask friends for a second opinion.
• Well-fitted, tailored clothes were rated more confident and successful within seconds, even with the face hidden.
• Beard oil nightly: castor oil, emu oil and diluted rosemary oil massaged into the skin underneath and left overnight. Beard balm with shea butter and beeswax.
• Derma stamp patchy beard areas 1 to 2 times a week, in several directions. Minoxidil works on the beard but has to be continued indefinitely.show source
• Smoking and drinking limit beard growth.
• Razor bumps: shave with the grain, on wet hair, without stretching the skin, using a single blade or a trimmer that leaves light stubble. Laser hair removal is the most effective long-term fix for persistent razor bumps.
• Brush twice a day for 2 full minutes, the second time before bed to limit morning breath, with an electric brush and soft bristles, inner surfaces too, and replace the brush head every 3 months. Spit out the toothpaste; do not rinse.
• Floss daily, not just the week before a dental visit. Interdental brushes clean between teeth better than floss where the gaps fit them, and a water flosser beats floss for gum inflammation. Water flosser first, then brush, then floss; flossing after brushing forms the habit more strongly.show source
• Scrape your tongue back to front, 3 to 5 gentle strokes.
• Alcohol-free mouthwash. Zinc or chlorhexidine formulas control odour best, but chlorhexidine is for short courses: long-term it stains teeth and alters taste. Salt-water mouth rinse before bed; tea tree oil mouth rinse: 2 to 3 drops in 2 oz of water.
• Professional dental cleaning twice a year.
• Gum recession does not grow back. Bleeding when flossing eases in 1 to 2 weeks, gum inflammation in 1 to 3 months.
• Gum disease often goes unnoticed. Risks: poor hygiene, smoking, aggressive toothpick use, dry mouth, snoring, excess iron.
• Gum supports listed: vitamin C 1000 to 2000 mg, K2 100 mcg or CoQ10 50 mg, B3 50 to 250 mg, oral probiotics, quercetin or EGCG, zinc 10 mg, folinic acid 400 mcg, selenium 100 mcg. Avoid iron supplements with active gum disease.
• Fluoride toothpaste is the best-evidenced part of cavity prevention. Too much fluoride causes dental fluorosis.show source
• Erythritol prevents cavities better than xylitol; monk fruit and allulose are neutral. Sugar-free erythritol gum and crunchy raw vegetables stimulate saliva.show source
• Dry mouth speeds decay regardless of brushing. Stay hydrated and breathe through the nose, which also reduces snoring; for a nose blocked by allergies, a daily steroid nasal spray is the most effective over-the-counter treatment.
• Sipping acidic drinks over an hour is worse for enamel than drinking them at once, and coffee, tea, red wine and soda stain it. Rinse with water after every meal and every acidic or staining drink, and wait before brushing.
• Grinding at night: see a dentist for a splint or mandibular device. Signs are a sore jaw or headaches on waking.
• Keep a travel toothbrush for long days out.
• Oil pulling: 1 tbsp cold-pressed coconut oil swished 15 to 20 minutes in the morning, spat into the bin not the sink, rinse, then brush. Do not swallow it. It reduces plaque a little but does not replace brushing and flossing.
• Whitening strips: in the evening, after gentle brushing, on dry teeth, folded behind the teeth, for the package time, over a 1 to 2 week cycle. Visible change in 2 to 3 days, significant at 2 to 3 weeks, some sensitivity in the first 1 to 2 weeks. Overuse damages enamel.
• Chew tough natural food evenly on both sides: crusty bread, steak, raw carrot. Three meals a day of conscious chewing is enough. For a weaker masseter spotted in a straight-on photo, bias chewing toward that side, never exclusively.
• Tongue posture: the whole tongue against the roof of the mouth, especially the back third, sitting just short of the point where breathing starts to close off. Tip just behind the front teeth without touching them. Teeth lightly together, lips closed, breathing through the nose. Hold it whenever you are not eating, talking or training.
• There is no controlled evidence that tongue posture changes adult bone structure. Palate suture fusion does not follow a fixed age window: about half are fused at every age from 10 to 25.
• Chin resistance: thumbs under the chin, hands pressed together, open and close against moderate resistance. 20 reps, 1 minute rest, 5 to 8 sets, adding pressure over time. Do it with neck work at the end of a workout, fully warm, starting light.
• Tongue press for the muscles under the chin: press the tongue hard into the palate for 10 seconds, 10 reps.
• Chin tucks: pull the head straight back into a double chin, not down. 10 reps every hour at a desk.
• Swallows for the muscles under the chin: tilt the head back, tongue up, swallow slowly against the stretch, 10 reps.
• Humming at a low pitch, sitting upright until the muscles under the jaw engage: 10 to 15 seconds, 5 rounds.
• Neck curls off the edge of a bench, curling into a double chin rather than forward. Direct neck extension training grew neck muscle about 13% in 12 weeks, where squats, deadlifts and rows alone did not, and neck and upper-back strength work supports posture.show source
• Facial asymmetry comes from genetics, habits, injury and muscle imbalance. Spot it with a flipped photo, and aim for about 90%, not perfect.
• Soft squint through conversation with the forehead completely still. 5 to 10 minutes of practice a day.
• Relax the forehead. Pull the brow ends up and back with the middle fingers to feel a positive tilt, but keep a neutral brow if it suits your face better.
• Male brows sit lower and flatter than female brows. Remove strays between and below them rather than thinning or arching.
• Topical minoxidil 2% on thin eyebrows beat placebo at 16 weeks. Bimatoprost (Latisse): short eyelashes, and it matched minoxidil for thin eyebrows. Eyelid skin darkens in about 3% of bimatoprost users.show source
• Smile lifts: raise the mouth corners as high as possible and hold 5 seconds, 10 to 15 reps morning and evening, adding resistance with fingers at the mouth corners. Smirks work one side at a time: 5 to 10 seconds, 10 to 15 reps per side, holding tongue posture. Resisted smiling also works in 20-second bouts spread through the day.show source
• Do not strain expression work. Straining creates lines. Rest between sessions and avoid furrowing.
• Facial bloat causes: sodium, dehydration (which causes water retention), poor sleep, alcohol, hormones, food sensitivity, sluggish lymph, skipping meals, sleeping flat, crash dieting.
• Lymphatic drainage on clean skin with oil, light pressure only, never on dry skin: the neck first (ear to collarbone, 5 to 10 times a side), then under the chin out along the jaw, cheeks from the nose outward, under the eyes with the ring finger, forehead from centre to temples, then the neck again. Never skip the neck.
• Lymphatic drainage reduces puffiness after one session and lasts hours. Daily if often puffy, 2 to 3 times a week to maintain.
• Fast facial depuffing: cold water, chilled spoons, an ice roller, cucumber slices.
• Skip any facial change that does not suit the rest of your face, and get second opinions on your face.
• Ears over shoulders, chin parallel to the floor. Forward head posture compresses the neck and flattens the jaw and neck line.
• Open, expansive posture increased romantic interest in speed dating and on a dating app. Power poses do not change hormones.
• No specific sitting or standing posture has been shown to cause back pain.show source
• Bar hang 20 to 30 seconds, 3 to 5 times a day. No swinging.
• Cat-cow, 10 to 15 slow reps, twice a day.
• Child's pose, 30 to 60 seconds, 2 to 3 times a day.
• Foam roll the full length of the spine for 5 to 10 minutes.
• Height cannot increase after growth plates close in the late teens to early twenties. Spinal decompression adds 1 to 2 cm right after, from disc rehydration, and it reverses within the day. Flexibility improves over 2 to 4 weeks. For back pain, traction does no better than sham. Inversion tables: start at 1 to 2 minutes.show source
• The occupational noise limit is 85 dBA averaged over 8 hours. Every 3 dB more doubles the damage rate and halves the safe time: 88 dBA for 4 hours, 91 for 2, 94 for 1, 97 for 30 minutes, 100 for 15.
• Loud music rehearsals run past safe limits: marching bands measured 90 to 96 dBA averaged in rehearsal and 94 to 103 dBA in performance, with peaks of 98 to 120 dB, and in one study every measured member exceeded the daily noise dose.
• Musicians have about 4 times the risk of noise-induced hearing loss and 57% higher risk of tinnitus than the general population. Noise-induced hearing loss is permanent.show source
• Musicians' earplugs use a flat filter that lowers volume without muffling pitch; foam plugs cut high frequencies far more than low ones. 15 to 25 dB of attenuation brings a 95 to 100 dBA rehearsal under the limit. Custom-moulded musicians' plugs cost more than generic filtered plugs and are the kind people keep wearing.
• Ringing or muffled hearing after loud exposure means damage already happened.
• Quiet time between exposures allows partial recovery; a loud rehearsal followed by loud headphones removes it. Headphones: the safe adult limit is 80 dB for 40 hours a week, and most phones track weekly headphone exposure.show source
• A phone sound-level meter app gives a usable reading of how loud a room is.
• 100% UV-blocking sunglasses outdoors, in wraparound frames plus a wide brim. UV causes cataracts and is linked to pterygium, corneal damage and eyelid cancer, and sunglasses also protect the skin around the eyes.
• During screen work, blink fully and deliberately, and look at something far away for about 20 minutes across every 90 minutes of close work. The 20-20-20 rule (every 20 minutes, 20 feet away, 20 seconds) is weakly supported: trials show no change in blink rate, though people report relief.show source
• Blue light from screens does not damage the eyes.show source
• Time outdoors protects against worsening nearsightedness. Window glass blocks the relevant light.show source
• Lubricating eye drops without vasoconstrictors. Redness-relief drops cause rebound redness.
• Eye exam every 1 to 2 years.
• Sudden floaters, flashes of light, or a curtain across your vision is an emergency.
• Iris colour is set by pigment in the iris. Detox, diet and iridology protocols do not change it.
• Screens at or slightly above eye level reduce eye surface exposure and neck strain.
• Protective eyewear for anything with projectiles, chemicals or power tools.
• HIV test at least once for everyone aged 13 to 64, as routine care.show source
• Annual chlamydia and gonorrhoea testing with new or multiple partners; most infections in men cause no symptoms. Guidelines disagree on routine screening for heterosexual men; ask for the tests by name, since they are not on a standard panel or physical.
• Men who have sex with men: chlamydia, gonorrhoea and syphilis testing at least yearly at every site of contact, regardless of condoms. Every 3 to 6 months at higher risk.show source
• A urine test does not detect throat or rectal infection, so testing has to match the sites of exposure. Every STI test has a window period; a very recent exposure can test negative.
• Condoms reduce but do not eliminate transmission. HPV and herpes spread from skin the condom does not cover.show source
• PrEP is available for ongoing HIV risk. HIV PEP: start within 72 hours of a possible exposure, the sooner the better, and finish the full 28 days.
• Doxycycline PEP: bacterial STI prevention for men who have sex with men with a recent STI. It cut syphilis and chlamydia by over 70% and gonorrhoea by about half.show source
• Partners need testing and treatment too, or reinfection follows.
• Sperm production needs testicles slightly cooler than core body temperature. Tight underwear, saunas, hot tubs and laptops on the lap all raise it. Regular sauna lowers sperm count and motility, recovering about six months after stopping; an ice pack on the groin during sessions may protect it, untested. Smoking, alcohol, BPA and phthalates also lower sperm quality. Wear loose, breathable natural fabrics over synthetics: cotton, wool, linen, hemp, bamboo.show source
• Erectile dysfunction is most often vascular or metabolic (high blood pressure, heart disease, diabetes), not low testosterone. In a young man it is worth checking as an early cardiovascular warning.
• High prolactin suppresses testosterone and sexual function. It is a simple blood test: prolactin plus a morning testosterone panel for sexual or energy symptoms.
• Men need estrogen too. Suppressing it hard lowers libido and causes joint and cognitive problems.
• The main modifiable inputs to testosterone are sleep, body fat, resistance training, alcohol and stress. Other listed causes of low testosterone: poor gut health, high-PUFA oils, processed food, endocrine-disrupting personal care products, microplastics, high iron, SSRIs, opioids, some antipsychotics, stimulants.show source
• Low testosterone supports listed: zinc 5 to 15 mg, boron 1 to 10 mg, black ginger. Do not avoid sunlight, cholesterol, saturated fat or salt.
• Tongkat ali and boron: small trials, tongkat mostly in stressed or low-testosterone men; boron lowers SHBG short-term. Black ginger, DIM, saw palmetto and beta-sitosterol: small, low-quality trials.
• The thyroid needs iodine, selenium and tyrosine. Very restrictive diets can fall short.
• Hormone testing, including testosterone, free testosterone and SHBG, only with symptoms and drawn in the morning. Under 30 with no symptoms, hormone panels mostly produce noise. See an endocrinologist for a suspected imbalance.
• Morning moderate-to-hard exercise supports a healthy cortisol rhythm.
• Blood panel yearly, or every 3 to 6 months while actively changing something it measures; bloodwork moves over months, not weeks. Retest at the same interval and under the same conditions, changing one thing between draws.
• Full panel: ApoB, fasting insulin, fasting glucose, HbA1c, lipids, triglycerides, hsCRP, TSH and free T4, full blood count, ferritin, transferrin saturation, vitamin D, B12, folate, liver enzymes, creatinine and eGFR, electrolytes, plus Lp(a) once in a lifetime. Ask for ApoB and fasting insulin by name; both are often left off standard panels. ApoB counts the particles that cause atherosclerosis and predicts risk better than LDL cholesterol, and fasting insulin rises years before glucose does.show source
• Ferritin also rises with inflammation. Read it next to hsCRP.
• Thyroid disease causes fatigue, brain fog, cold intolerance and hair changes, but explains only a small share of fatigue. TSH rules it out.
• One result is a data point, three are a trend. Do not act on a single out-of-range result, or on a normal result that contradicts a clear symptom.
• Check blood pressure at home once a month.
• Skin and mole check yearly, sooner for anything changing.
• Testicular self-exam monthly. Testicular cancer peaks between 15 and 35 and is almost always curable caught early. Sudden severe testicular pain is an emergency: torsion needs surgery within about 6 hours to save the testicle.
• Useful numbers to track: resting heart rate, HRV, sleep duration and efficiency (any wearable covers these four), blood pressure, weight, waist, body fat, VO2 max, strength, mobility.
• Check hearing, vision, skin, teeth, bone health, mental health and family history as part of routine prevention.
• Discuss age-appropriate vaccinations at checkups: flu vaccine every year, tetanus booster every 10 years.
• HPV vaccine through age 26 if the series was not completed. It prevents genital warts and throat, anal and penile cancers.
• Ask about meningococcal vaccines if living in student housing. MenB is offered up to age 23.
• Creatine monohydrate 5 g daily, the best-supported supplement by a wide margin. No loading phase (it only saturates faster, days instead of weeks, to the same end point), timing irrelevant, and no established interaction with caffeine.show source
• Creatine for cognition: small and inconsistent in rested people, thin evidence under sleep deprivation.
• Creatine causes 1 to 2 kg of water retention inside muscle. It is not facial bloat.
• Beta-alanine 4 to 6 g a day, split, for at least 2 to 4 weeks improves hard efforts lasting 1 to 4 minutes. The skin tingling is harmless.show source
• Whey protein when food falls short.show source
• Vitamin D3 only against a measured deficiency, taken with a fatty meal; it matters most with little sun. Very high chronic doses cause high calcium.
• Omega-3 with more than 1 g EPA daily from a low-metal source, or oily fish twice a week: mood, inflammation, triglycerides, attention. High doses raise bleeding risk and carry an atrial fibrillation signal, especially with aspirin or blood thinners.show source
• Zinc 10 to 15 mg with food. Lozenges started within 24 hours of a cold modestly shorten it. Above about 40 mg a day long-term, zinc causes copper deficiency and nerve symptoms.
• Magnesium: weak for sleep (threonate or bisglycinate before bed has a small effect), real for correcting a deficiency. Glycinate or citrate over oxide; threonate and bisglycinate are the forms that reach the brain. Loose stools at high doses.
• NAC: real if mixed trial evidence for OCD, hair pulling and substance craving. Nausea is common.show source
• Inositol for anxiety and OCD: positive trials only at high doses, 12 to 18 g a day. It is also used for falling back asleep after waking at night, with weak evidence. Myo-inositol, not plain inositol, is the studied form.
• Multivitamin: no mortality or heart benefit in well-fed people. Harmless insurance.show source
• Oral GABA does not meaningfully cross into the brain.
• Bacopa and saffron have the least weak evidence of the cognitive supplements.
• Ashwagandha: small trials for testosterone, cortisol and stress. Rare liver injury reports, and it alters thyroid hormone; avoid with thyroid or liver disease. Rhodiola is used alongside it for stress, with weak evidence.
• Zinc, vitamin D, B vitamins, molybdenum, chromium, selenium, iodine, vitamin C, K2 and CoQ10: correcting a measured deficiency works, including zinc or vitamin D for testosterone; topping up when you are not deficient does little.
• B6 above about 100 mg a day long-term causes nerve damage. The usual route is stacking several products that each contain it.
• Niacin flushing is harmless. High-dose sustained-release niacin damages the liver. Immediate-release is safer.
• Iodine excess can trigger thyroid problems, especially with existing thyroid disease.
• Vitamin A accumulates and is toxic in excess. Liver once or twice a week at most.
• Concentrated green tea extract has caused liver injury, especially on an empty stomach. Brewed green tea has not.show source
• Kava works for anxiety and has caused liver injury. Restricted in several countries. Never with alcohol.
• Lithium orotate is sold over the counter, but lithium has a narrow safety margin and no chronic safety data in this form. It interacts with NSAIDs, diuretics and ACE inhibitors.
• High-dose biotin distorts troponin and thyroid tests and has caused missed heart attack diagnoses. Stop 72 hours before blood work and tell the lab.
• Quercetin, bromelain, EGCG, luteolin, astaxanthin, pycnogenol, curcumin, milk thistle and lactoferrin: mostly lab or small studies.
• Glycine, taurine, agmatine, passionflower, valerian, chamomile, lemon balm, magnolia bark, skullcap, apigenin, tart cherry and kiwi: small effects at best for calm and sleep. Rotating sleep supplements to avoid tolerance is proposed but unproven.
• Tyrosine, acetyl-L-carnitine, CDP-choline, alpha-GPC, phosphatidylserine, ginseng, ginkgo, NADH, phenylethylamine and PEA: none established for focus or mood.
• Mucuna pruriens is L-DOPA and brings a real dopamine crash afterward.
• NR, NMN and urolithin A: weak evidence, and effects on lifespan in people are unclear.
• Before adding any supplement, test, find a measured gap, discuss it with a clinician, then retest: the right choice depends on diet, bloodwork, medical history, liver and kidney function and other medications. Do not copy someone else's stack, and add supplements one at a time, weeks apart. Choose products certified by NSF Certified for Sport or Informed Sport; unverified ones are often mislabelled or spiked with drugs.
• Prescription drugs need a prescriber for dosing and interaction checks.
• Isotretinoin: severe or scarring acne. The most effective acne treatment, with required monitoring; low-dose regimens clear acne with fewer side effects than standard doses.
• SSRIs including fluvoxamine: OCD, depression and anxiety. Fluvoxamine is well supported in OCD.
• Propranolol: performance anxiety, migraine prevention, blood pressure. Not with asthma.
• Trazodone: depression at higher doses, sleep at low doses. Lemborexant and suvorexant: orexin-blocking sleep drugs, best combined with CBT-I.
• Modafinil: narcolepsy and shift-work sleep disorder. Off-label for stimulant withdrawal.
• Stimulant medication for ADHD has one of the largest effect sizes in psychiatry. Guanfacine is the main non-stimulant.
• Tadalafil: erectile dysfunction and enlarged prostate. Never with nitrates.
• Thyroid hormone replacement only for diagnosed hypothyroidism, with monitoring.
• No trial has shown that any drug repurposed for longevity extends healthy life in people who are not already ill.
• Anger and irritability triggers listed: glucose spikes, insulin resistance, short sleep, no exercise, overwork, screens, alcohol, stimulants, benzodiazepines, SSRIs, sleeping pills, opioids, steroids, antipsychotics used for sleep.
• Anger and irritability supports listed: lithium orotate 1 to 5 mg, omega-3, B1 25 to 100 mg, B5 100 to 250 mg, molybdenum 100 to 250 mcg, vitamin C 100 to 500 mg.
• Tying particular kinds of anger to particular deficiencies cannot be confirmed. Deficiencies produce nonspecific symptoms and are diagnosed by blood test.
• OCD is worsened by poor sleep, no exercise, processed food, gluten, high-lectin food and artificial additives, as listed.
• OCD: exposure and response prevention therapy is the front-line treatment, alongside medication.show source
• OCD supports listed: NAC 500 to 2000 mg, inositol 1000 to 15000 mg. Also glycine, zinc, milk thistle, borage oil.
• Anxiety: exercise and cutting caffeine have the best support, and CBT is the best-evidenced therapy. Also listed: sun, sauna, meditation or yoga, less alcohol, no gluten, fewer grains, beans and legumes, and a keto trial before medication.show source
• Anxiety supports listed: molybdenum 100 to 250 mcg, lithium orotate 1 to 5 mg, B6 5 to 10 mg, taurine 500 to 2000 mg. Also passionflower, black seed oil, kava, agmatine, NAC, theanine, magnesium, niacinamide, thiamine.
• Anxiety matched to type, as proposed: chest-felt anxiety to molybdenum, taurine or niacinamide; mood swings to lithium, NAC or B6; anger to lithium or molybdenum; depressive to B6 or agmatine; tiredness to molybdenum and B1; tired but wired to passionflower, black seed oil, taurine or agmatine; OCD-type to NAC. Unvalidated.
• Colds and flu: hand washing cuts respiratory infections by about 16%. Sun, less stress, enough sleep and protein.show source
• Cold and flu supports listed: zinc 5 to 15 mg with quercetin or EGCG, vitamin C 500 to 1000 mg, PEA 300 to 600 mg, NAC 600 mg for mucus.
• At the first sign of a cold, as suggested: double the zinc and vitamin C doses, add elderberry, andrographis, propolis or oregano oil, and eat one meal a day with no dairy, sugar, processed food or alcohol. Those four herbs, and echinacea, have weak evidence.
• Depression: exercise and structured psychotherapy are front-line. Also sun, fixed sleep, fewer screens, and leaving toxic work or relationships.
• Depression supports listed: B6 5 to 10 mg, B12 hydroxocobalamin 1000 mcg as a slow-dissolve lozenge held in the cheek, zinc 5 to 15 mg, lithium orotate 1 to 5 mg, saffron, NAC 500 to 1000 mg.
• Very low B12 levels can cause a few days of overstimulation when supplementation starts.
• Frequent urination deserves a doctor. First-line self-care is less caffeine and alcohol.
• Frequent urination triggers listed: sugar, caffeine, high-oxalate food, citrus, cranberry juice, fizzy drinks, gluten, artificial sweeteners, erythritol.
• Frequent urination supports listed: B1 50 to 100 mg, B5 100 to 250 mg, quercetin, low-dose zinc, lactoferrin.
• Thiamine deficiency symptoms: fatigue, weakness, exercise intolerance, poor appetite, constipation, swelling, breathlessness, dizziness on standing, poor temperature control, fast heart rate, low blood pressure, pins and needles, urinary urgency, depression, anxiety, irritability, apathy, brain fog, poor word recall.
• Thiamine deficiency causes listed: high sugar, carbohydrate or alcohol intake, long-term stress, gut problems, infections, some antibiotics.
• Thiamine self-test as suggested: 100 mg thiamine HCl, watch for an initial reaction, then lower the dose and build up. A blood test is more reliable.
• ADHD is worsened by heavy scrolling and gaming, alcohol, gluten, processed food, deficiencies, poor sleep, snoring and sleep apnea.
• ADHD improves with regular exercise, morning sunlight, meditation or prayer, phone in another room, reading, writing, creative projects and naps.
• ADHD supplements as grouped: saffron, zinc, ginseng, tyrosine or NADH for motivation; NAC, lithium, CDP-choline or magnesium for impulse control; pycnogenol, B6, niacinamide or saffron for restlessness; bacopa, omega-3 or ALCAR for focus; B1, omega-3, CDP-choline or bacopa for memory. Hit or miss.
• ADHD is diagnosed on severity, consistency and interference across settings, not isolated trouble focusing. Rapid task switching produces ADHD-like attention symptoms without being ADHD.
• Brain fog: rule out thyroid disease, anaemia, B12 deficiency and sleep apnea first.
• Brain fog lifestyle list: sun, exercise, good sleep, less phone and gaming, less junk food, gluten, dairy, sugar, alcohol, histamine and caffeine.
• Brain fog supports listed: B1 50 to 200 mg, hydroxocobalamin 250 to 1000 mcg occasionally, EGCG or lactoferrin, molybdenum 250 to 500 mcg. Also ginseng, pycnogenol, creatine, luteolin, NAC, omega-3, magnesium, CDP-choline.
• Athletic performance: progressive overload, enough carbohydrate and protein, and creatine outrank everything else.
• Athletic performance supports listed: B1 50 to 200 mg, L-carnitine 250 to 500 mg, molybdenum 100 to 250 mcg, pycnogenol, NADH 2.5 to 5 mg, D-phenylalanine 500 to 1000 mg.
• Low appetite or undereating: increase food slowly. Refeeding too fast after long restriction causes dangerous electrolyte shifts.
• Low-appetite supports listed: B1 10 to 50 mg, zinc 5 to 12.5 mg, boron 0.5 to 1 mg, cannabis, cyproheptadine. Deficiencies common with undereating: vitamin C 100 to 500 mg, inositol from 500 mg up to 5 g.
• Avoid people and media that feed a distorted body image.
• Eating disorders carry the highest mortality of any psychiatric condition and respond to structured treatment with medical monitoring.
• Never heat or store food in plastic; use glass or steel. Avoid single-use plastics and plastic water bottles. Endocrine disruptors: BPA and phthalates in plastics, cans and takeout packaging; parabens and synthetic fragrance in personal care; pesticides on produce. Choose low-ingredient products, cut unnecessary synthetic fragrance, and wash produce.
• Filter drinking water, testing the supply first, since the right filter depends on what is in it. Carbon block filtration at minimum, reverse osmosis with remineralisation for full treatment. Alkalinity itself has no proven benefit.
• Open windows daily and use extraction when cooking. HEPA air purifier where outdoor air is poor, where there is damp, or in the bedroom if allergens disturb sleep. Damp and mould harm the lungs.
• Choose alternatives to non-stick cookware.
• Uncertain chemical exposures: take the free, permanent swaps and skip the ones that need daily vigilance.
• Two drinks a week or fewer, and one per occasion at most: beyond two a week, harm becomes measurable. One to two drinks a day is associated with thinner cortex and less grey matter.show source
• Alcohol raises cancer risk, disrupts the gut barrier and hormones, drives inflammation, lowers testosterone, raises estrogen, suppresses IGF-1, dehydrates, puffs up the face, and hurts attention and motivation for a couple of days afterward.show source
• No hangover cure or supplement has better than very low-quality evidence.show source
• Heavy drinking rewires habit and impulse circuits. Some of it reverses with sustained abstinence.
• Nicotine sharpens focus short-term and is among the most addictive substances available. It raises blood pressure, cuts blood flow to organs and brain, damages blood vessel linings, and raises stroke, heart attack and vascular disease risk.
• Tobacco smoke carries dozens of carcinogens. Vaping removes combustion products, but its long-term effects are unknown.
• Nicotine pouches avoid smoke but cause gum recession and white lesions where they sit, with the same addiction.show source
• Quitting nicotine: patches, gum, lozenges and nasal spray work alone or combined. Bupropion helps some people, and clinical hypnosis has trial support. The first week is the hardest; exercise and social support cut relapse.
• Cannabis: heavy use is linked to anxiety, depression and psychosis, most in those genetically predisposed.
• Repeated vomiting relieved by hot showers in a heavy cannabis user is cannabinoid hyperemesis syndrome. Stopping cannabis is the only cure.
• Edibles spare the lungs but are easier to overdose because they kick in late.
• Indica and sativa labels predict effects poorly. Expectation explains much of the difference.
• Phone use while driving roughly quadruples crash risk, and hands-free is no safer.show source
• Work in roughly 90-minute blocks, then take 10 to 30 minutes to deliberately switch off.
• Bright overhead light while working.
• Phone in another room, not face-down on the desk.
• Focus follows the eyes. Fix your gaze on one point for 30 to 60 seconds before starting.
• A clean, uncluttered workspace, with noise-cancelling headphones for distracting environments.
• A walking or treadmill desk raises alertness.
• No phone in the first hour after waking: no messages, news or social media before the first hour of focused work is done.
• Turn off every notification you did not deliberately choose, and check messages in scheduled windows.
• Screen-free meals.
• Passive scrolling is the harmful pattern; active social media use, actually talking to people, is not. Replace passive scrolling with making something: reading, writing and creative projects rebuild attention.
• Recreational screens under two hours a day. Mood and sleep benefits appear at that threshold.
• Spaced repetition and active recall are the two best-supported study techniques. Test yourself soon after first exposure with open-ended recall questions, then review and retest what you got wrong; self-testing beats rereading by a wide margin. Interleave similar topics or problem types rather than practising one block at a time.show source
• Short 10-second pauses during study let the brain replay what you just covered.
• A nap of 20 minutes or less after learning strengthens it.show source
• Keep learning new skills. Novelty and challenge maintain brain plasticity.
• 40 Hz binaural beats are proposed to aid memory and focus. Weak evidence.
• Strong social ties raise survival odds by about 50%, and broad social integration nearly doubles them, comparable to quitting smoking and larger than obesity or inactivity. Living alone versus with others made no significant difference; breadth of roles and regular contact carried the effect.show source
• Two recurring in-person commitments a week, one of them a structured group where people expect you; a recurring group with outside obligation lasts. Replace any social commitment that ends within two weeks, and protect them when work piles up.
• Quality of contact matters more than quantity. Brief casual chats still count.
• Volunteering and community involvement strengthen social ties. Hobbies with structure and people predicted fewer depressive symptoms and higher life satisfaction over years.
• Name emotions precisely: recognise, understand, label, express, regulate. Journal them instead of ruminating on them.
• Listen to understand, not to reply.
• Repair after conflict with a sincere apology.
• Gratitude journaling has a small effect, weaker than it is marketed.
• Meditation helps anxiety and depression moderately at 8 weeks but does not beat exercise or other active treatments.show source
• Therapy options: CBT, DBT, internal family systems. Clinical options include neurofeedback, TMS and ECT.
• Persistent low mood, loss of interest or thoughts of self-harm lasting more than two weeks: get a professional assessment. In a crisis, call or text 988 in the US, or your local emergency number elsewhere.
• Write one if-then plan per habit before starting: if [specific cue], then I will [specific action]. The best-evidenced single technique, effect size 0.65. Picturing only success lowers the odds of achieving it, so also name the concrete obstacle and write an if-then plan for it.
• One new habit at a time: planning several goals at once wipes out the benefit planning gives a single goal. Several actions that share one trigger can go in together as one habit. Across whole programmes, changing several health behaviours in sequence or at once works about equally well, and both beat doing nothing.
• Set specific, hard goals, defined as verbs with measurable criteria: they beat 'do your best' in about 96% of studies, as long as goals do not conflict. Writing them by hand is weak evidence but costs nothing.
• Go hard within a habit, not tiny. Quitting abruptly beat tapering, 49% against 39%.show source
• Anchor habits to an existing event, not a clock time: 'After I brush my teeth,' not 'at 7:15.' Flexible timing beat rigid schedules during and after the program, and habits anchored early in the day tend to be stronger. Put cues where the behaviour happens: sunscreen next to the toothbrush, creatine next to the coffee.
• Do not rely on motivation; action comes before it, so use discipline to start and motivation to continue. Decide in advance, not in the moment: make daily exercise a default rather than a daily decision, automate the decision to start while letting the steps vary, remove bad options, pre-commit, and treat inconsistency as a system problem.
• Enjoying a behaviour predicts how automatic it becomes, independent of repetition.
• Habit automaticity takes 59 to 66 days on average, with a range of 4 to 335, and missing a single day does not damage it. Judge a new habit at eight weeks, not two.show source
• Gradually increasing difficulty predicts long-term results specifically. Make it harder around week five: tighter tolerance, an extra set, an extra session.
• The usual failure is not burnout but one miss turning into a full stop. Reward coming back after a missed workout, the best of 54 interventions tested: count completion rate and returns, never streaks, and mark returns with an R in your log. Review failures without self-hatred and re-enter immediately rather than restarting; after three or more misses in a row, drop back to the easy version for 14 days, then build again.show source
• Plan exceptions with a set boundary and a set return; an open-ended cheat day becomes a standing loophole. Travel, illness and crunch weeks: keep the log and the easiest version of the habit, drop the escalation on purpose, and push the review date back rather than resetting.
• Self-monitoring is the most reliably predictive single technique, and tracking results as well as behaviour adds more. Write a one-line daily log in under 30 seconds: date, done or not, and one 1 to 5 number for how the day went. Review weekly for 5 minutes, and monthly check each habit's 28-day completion rate: under 60% means repeat and repair that habit before adding a different one.
• Change one variable, then measure. Changing several at once gives a result you cannot explain.
• Autonomous motivation predicts whether habits last; pressure to adopt them does not, and self-chosen habits form more strongly. Cut anything you are doing only out of obligation.
• Typical behaviour change effects are modest, 0.24 to 0.37 standard deviations, and shrink about 35% from short term to long term. Only 8% of interventions in the largest field study outlasted the program. Plan for the fade.
• Bright lines beat limits. 'None' takes no decision. 'Some' takes one every time.
• Name the version of you that breaks the rules, write down the arguments it uses, and prepare rebuttals in advance. Give the self you trust the authority to decide for the one that sabotages, for example the rested morning self over the tired evening self.
• Start new habits at a fresh start: gym attendance rises 33% at the start of a week and 47% at the start of a semester.
• Pair something you dread with something you want, allowed only during it, such as a favourite podcast or audiobook saved for training: a 51% initial increase, 10 to 14% still after 17 weeks.
• A commitment contract with real money at stake has the best long-run record of any incentive.
• Only unpredictable, intermittent rewards kept working after rewards stopped.
• Motivation dips predictably in the middle of a long pursuit. Plan for the middle.
• Over-celebrating a win dulls the next one.
• Personality changes follow behaviour. People changed traits over 16 weeks only by using if-then plans tied to concrete behaviours.
• When trade-offs appear: sleep first, then metabolic health, exercise, nutrition, relationships, everything else. No supplement makes up for missing sleep, daylight or training.
• Strength rises within 1 to 3 weeks, mostly from the nervous system. Visible muscle takes 6 to 12 weeks. Most physique change happens over 6 to 24 months.show source
• Regular sleep timing: easier waking within 3 to 7 days, steadier mood and appetite in 2 to 4 weeks, automatic by 2 to 3 months.
• Sauna tolerance improves within weeks. The mortality data reflects decades of use.
• The habits with the strongest evidence (sunscreen, regular sleep, strength training, social ties) give the slowest feedback, and the weakest (drainage, cold plunges, debloating) give it within hours. Do not judge by feel; most people abandon a working practice because they judge it too early.

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Last updated 18 September 2026.