Evidence-based hair loss reference
Hair loss, without the sales pitch.
79 guides compiled from peer-reviewed medical literature, every claim cited so you can check it yourself. No products to sell you, no consultation to book — just what the studies actually found, including where they found nothing.
Conditions
What is actually causing the shedding — and how each type behaves.
9 guidesDiagnosis & Testing
How hair loss is identified, which blood tests matter, and when to see a doctor.
10 guidesOral Treatments
The prescription medicines, what the trials measured, and what they cost you.
10 guidesTopicals
Minoxidil and everything applied to the scalp, ranked by evidence.
10 guidesProcedures & Devices
Transplants, PRP, lasers and microneedling — what the studies actually show.
10 guidesScalp Health
The skin the hair grows out of, and the conditions that damage it.
10 guidesDiet & Lifestyle
Where nutrition genuinely matters, and where the supplement aisle is selling you nothing.
10 guidesWomen's Hair Loss
Female pattern loss, postpartum shedding, menopause, PCOS and iron.
Start here
- Androgenetic Alopecia: Complete GuideAndrogenetic alopecia affects 50% of men by 50 and 75% of women over 65. Learn causes, diagnosis (98% accurate trichoscopy), treatments with 83-87% response rates, a
- Telogen Effluvium: Causes and Recovery TimelineTelogen effluvium causes sudden hair shedding 2-3 months after stress. 95% recover fully within 6 months. Learn triggers, timeline, and when to expect regrowth.
- How to Tell If You're Going Bald: Early Signs & Self-Assessment Guide (2026)Normal shedding is 50-100 hairs/day. Pattern baldness shows temple recession, crown thinning, and hair miniaturization. Learn the Norwood scale stages and when to se
- Hair Loss Blood Tests: What to Request and Why (2026)Request CBC, ferritin (optimal >70 ng/mL), TSH, vitamin D for hair loss. Low iron found in 40% of women. Learn optimal ranges vs lab 'normal' and which tests you act
- DHT and Hair Loss: Complete ExplanationDHT is 10x more potent than testosterone. Learn how 5-alpha reductase creates DHT, why genetics determine sensitivity, and how blockers like finasteride reduce DHT 7
What this is
Every guide here is between two and four thousand words, ends with its sources, and links to the trials it draws on. 234,000 words in total. Where the evidence is weak — and in this field it often is — the guides say so rather than filling the gap with confidence.
It is written to be checked. If a number here disagrees with the paper it cites, the paper is right and we want to know. How we write sets out the method, the limits, and who is behind it.