Does it actually work?
Nineteen claims. Five verdicts. One question per claim: does it work, or is it cope? Each verdict is grounded in cited evidence — no affiliate spin, no sponsored placements.
Mewing reshapes the adult face
Real for posture, midface support and soft-tissue tone; close to nothing for adult skeletal change. Years of practice for a subtle effect.
Read the verdictMouth taping at night improves sleep and jaw
Real benefit for chronic mouth breathers — better sleep continuity, less dry mouth. Useless if you already nasal-breathe. Dangerous if you have undiagnosed sleep apnea.
Read the verdictIce baths build mood, focus and recovery
Real for mood and dopamine baseline; mixed for athletic recovery; mildly hurts post-workout hypertrophy if done within 4 hours.
Read the verdictJaw exercisers (Jawzrsize, jaw trainer) sculpt the jawline
Masseter hypertrophy is real but cosmetically the result is round, not chiseled. Real risk of TMJ disorders, asymmetric growth, and headaches.
Read the verdictHitting your face with a hard object remodels the bone (Wolff's law)
Wolff's law is real but requires CHRONIC, sub-injury load — not acute trauma. Self-hitting causes microfractures, asymmetric remodeling, possible nerve damage. Zero supporting studies.
Read the verdictRosemary oil regrows hair like minoxidil
One real RCT showed comparable density gain to minoxidil 2% at six months. Smaller effect than minoxidil 5%, but a real signal — and topical, cheap, no Rx.
Read the verdictCollagen powder improves skin, hair and joints
Some signal for skin elasticity and joint pain at 10g+/day. But your body breaks collagen into amino acids — protein-adequate diets get 90% of the same benefit cheaper.
Read the verdictBlue light glasses prevent eye strain and improve sleep
Meta-analysis of 17 RCTs: no effect on eye strain, visual performance, or sleep. Theater. The screen brightness and viewing distance are what actually matter.
Read the verdictFinasteride (Propecia) stops and partially reverses hair loss
The most-studied AGA drug. Reduces DHT by ~70%. Stable or improved density in 80-90% of users over years. Sexual side effects 1-4%, mostly reversible.
Read the verdictMinoxidil 5% topical regrows hair
About 60% partial regrowth, 80% slowed progression at 12 months. OTC, well-tolerated. Lifetime commitment — stop and the gain reverts.
Read the verdictDerma roller (microneedling) regrows hair
Real adjunct effect — adding microneedling to minoxidil roughly doubles density gain in trials. Standalone effect is modest. 1.5mm roller, once a week, not daily.
Read the verdictBiotin gummies / 'hair vitamins' regrow hair
Biotin deficiency is real — almost nobody has it. For deficient users, supplementation restores hair growth; for everyone else, it's a $20/month placebo with a real risk of interfering with lab tests.
Read the verdictModafinil enhances cognition and focus
Real cognitive enhancement in well-rested AND sleep-deprived users — particularly working memory, attention, executive function. Rx-only. Tolerance and sleep disruption are the catches.
Read the verdictCaffeine + L-theanine outperforms caffeine alone
Caffeine 100mg + L-theanine 200mg gives alertness without jitters. Cheapest, safest, most-replicated cognitive stack that exists.
Read the verdictMastic gum builds a defined jawline
Masseter hypertrophy is real and visible — a sharper angle of the mandible after months of high-resistance chewing. Skeletal remodeling is documented in animal models but tiny in adults.
Read the verdictAshwagandha reduces stress and boosts testosterone
Cortisol reduction signal is real for chronically stressed adults. Testosterone bump is small (~15%) and only documented in specific populations. Liver toxicity reports are real at high doses.
Read the verdictVitamin D supplementation improves health and looks
Real benefit IF you are deficient. Most populations are. Aim for serum 25-OH-D 40-60 ng/mL. Test, don't guess. No incremental benefit past sufficient.
Read the verdictCreatine monohydrate builds strength, muscle and cognition
Most-studied supplement that exists. Real strength + hypertrophy + cognitive gains, especially in vegetarians. Cheap, safe, no loading phase needed.
Read the verdictNMN / NR (NAD+ precursors) slow aging
Spectacular mouse data, underwhelming human data. NAD+ levels do rise; downstream effects on aging endpoints in humans are tiny. $50/month for ambiguous benefit.
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