Hair Loss

Testosterone & Hair Loss

The relationship between testosterone and hair loss is more nuanced than most people think. It's not testosterone itself that causes hair loss — it's dihydrotestosterone (DHT), a more potent androgen converted from testosterone by the 5-alpha reductase enzyme.

DHT binds to receptors in hair follicles on the scalp, causing them to miniaturize and eventually stop producing visible hair. However, this only occurs in men who are genetically predisposed to male pattern baldness (androgenetic alopecia).

Types of Hair Loss

• Male pattern baldness — Receding hairline and crown thinning (genetic + DHT)
• Diffuse thinning — Overall thinning that can indicate hormonal imbalance
• Body hair loss — Reduced body and facial hair from low T
• Telogen effluvium — Stress-related shedding, sometimes triggered by hormonal changes

Does TRT Cause Hair Loss?

TRT can potentially accelerate hair loss in men who are already genetically predisposed to male pattern baldness, since more testosterone means more available for conversion to DHT. However:

• Many men on TRT experience no change in hair
• Some men actually report improved hair quality from better overall health
• DHT blockers (finasteride) can be used alongside TRT to protect hair
• Low testosterone itself can cause hair thinning — so TRT may actually help

Management Options

If hair loss is a concern while considering TRT, discuss these options with your clinic:

• Finasteride (Propecia) — Blocks DHT conversion, preserves hair
• Minoxidil (Rogaine) — Topical treatment that stimulates hair growth
• Low-dose DHT monitoring — Track DHT levels and adjust protocol
• Microneedling + PRP — Emerging treatments for hair restoration

Consult a TRT clinic to discuss your individual risk profile.