The Science of Hair Loss
Androgenetic alopecia (pattern hair loss) affects roughly 50% of men by age 50. Understanding why it happens is the first step toward effective treatment.
The DHT Connection
Hair loss is driven by dihydrotestosterone (DHT), a hormone derived from testosterone:
- The enzyme 5-alpha reductase converts testosterone to DHT
- DHT binds to receptors in hair follicles
- Affected follicles miniaturize — producing thinner, shorter hairs
- Eventually, follicles stop producing visible hair entirely
The Norwood Scale
Hair loss follows predictable patterns:
- Stage 1–2: Hairline recession at temples
- Stage 3–4: Crown thinning becomes noticeable
- Stage 5–7: Extensive loss across the top of the scalp
Why Early Treatment Matters
Hair loss treatment is far more effective at maintaining existing hair than regrowing lost hair. The follicles that have completely miniaturized are much harder to revive.
"The best time to start treatment was when you first noticed thinning. The second best time is today." — Dr. Rachel Kim, Dermatology
Genetics vs. Lifestyle
While genetics determine susceptibility, factors like stress, nutrition, and hormonal health influence the rate of progression.