Hair Loss, Testosterone and DHT: What Men Should Know

Hair loss, testosterone and DHT are often bundled into one story about masculinity. They should not be treated as interchangeable measurements. Understanding the role of a hormone in hair biology does not tell you your own blood level or which treatment is appropriate.

What DHT is

Dihydrotestosterone, or DHT, is an androgen formed from testosterone and has roles in male development. It is not simply a waste product that everyone should try to eliminate. [1]

Be careful with language such as blocking the cause at its source. Before considering a product, ask which condition is actually being discussed and what evidence supports its use for that condition.

Why pattern hair loss is more than a blood number

MedlinePlus Genetics describes androgenetic alopecia as involving genetic factors and androgen effects, particularly DHT, at the hair follicle. [2]

Appearance cannot replace assessment

Male pattern baldness is usually assessed from its pattern and history; other investigations may be needed when another cause is suspected. [3]

Do not use a receding hairline as a home hormone test. Explain the timing and pattern of loss to a clinician, and distinguish your wish to understand the cause from a wish to change the haircut. Those are both reasonable aims, but they lead to different conversations.

Testosterone testing answers a different question

Testosterone results require clinical interpretation and cannot by themselves diagnose a condition. [4]

If testing is suggested, ask why and what it would change. A commercial panel containing more hormones is not necessarily a better answer to your particular concern. Keep the laboratory report and the explanation together.

Hair treatments can matter to sexual health

Finasteride can cause erection difficulties, reduced sexual interest or ejaculation problems; some sexual effects may persist after stopping. Discuss symptoms with the prescriber. [5]

Discuss the trade-offs before deciding

Ask about expected benefits, uncertainties, adverse effects and follow-up for the exact treatment proposed. Tell the clinician about existing sexual concerns and all products you already use. An account of a side effect is important information, not something to dismiss because a medicine is marketed for appearance.

This article does not tell you to begin, stop or alter a prescription. For an individual decision, use the prescriber's advice and the current patient information supplied with the medicine.

Keep your goals separate

You may want an explanation for hair loss, a style that suits your current hair, or a treatment discussion. Write those goals separately. A haircut guide can help with appearance; a hormone result needs interpretation; a prescription involves a benefit-risk decision.

Do not judge sexual health from scalp hair or purchase a “DHT blocker” because a headline makes the relationship sound simple. Ask for evidence about the actual product and condition, not a general claim about hormones.

Further reading

• What testosterone results mean.
• Common causes of low libido.
• Why men lose hair.

Men’s Sexual Health