A potent androgen formed from testosterone in tissues such as skin and hair follicles.

What DHT is and where it comes from

DHT (dihydrotestosterone) is a type of androgen, the group of hormones usually associated with male traits that are also present in women’s bodies at lower levels. DHT is not released directly in large amounts. Instead, it is formed when an enzyme called 5-alpha-reductase converts testosterone into a stronger form inside local tissues, especially the skin and hair follicles. Because this conversion happens within the tissue itself, the level of DHT in the blood does not always reflect the effect actually being felt on the skin or hair.

Why it matters for PCOS

In PCOS, some women have higher androgen levels, and their hair follicles may be more sensitive to the effect of DHT. This is why DHT is often discussed alongside skin and hair signs such as acne, oily skin, excess facial hair (hirsutism), and scalp hair thinning. Interestingly, this sensitivity differs from one person to another, so two people with similar androgen levels can show very different effects on their skin and hair. Even so, these signs vary from person to person, and not everyone with PCOS experiences them. For a wider view of how these hormones work, see the hormones and PCOS symptoms pages.

Is DHT measured in testing

DHT is rarely measured routinely in PCOS assessment. Doctors usually check testosterone as a marker of androgens, because the effect of DHT depends on enzyme activity within local tissues, which is hard to capture with a standard blood test. As a result, test results are always interpreted alongside your symptoms and health history rather than as a single number. You can read more about the overall picture on the what is PCOS page.

When to talk to a doctor

If signs such as hirsutism, persistent acne, or hair thinning bother you, a doctor or pharmacist can help explain the options that may suit you. Some medicines that block androgen effects are prescription-only and need monitoring, so any decision about specific medicine or skin care is best discussed with a health professional rather than started on your own based on information online.

This glossary is education, not diagnosis. For your own situation, ask a doctor or pharmacist.