DHT Test: What Dihydrotestosterone Results Mean

What Is a DHT Test?

A DHT test measures the level of dihydrotestosterone in your blood. DHT is an androgen hormone made from testosterone by an enzyme called 5-alpha reductase. It acts in the skin, hair follicles, and prostate gland. Although men produce far more DHT than women, small amounts are present in everyone and the test can be ordered for any adult.

DHT is much more potent than testosterone at the androgen receptor. That potency explains why normal testosterone with high DHT activity can still cause hair loss or prostate enlargement. A DHT blood test is a simple venous blood draw, and no special preparation is usually needed, though your test order may include specific instructions.

Why a DHT Test Is Ordered

• Hair loss or thinning, including male or female pattern hair loss
• Enlarged prostate or urinary symptoms in men
• Excess facial or body hair, acne, or scalp hair loss in women
• Monitoring treatment with 5-alpha reductase inhibitors such as finasteride or dutasteride
• Evaluating suspected androgen excess alongside testosterone testing

Doctors often order DHT together with total and free testosterone so the full androgen picture is visible. This is educational information, not medical advice, and results should be reviewed with a qualified clinician.

Normal DHT Range

Reference ranges vary by laboratory and assay. Typical adult ranges are:

Always compare your result to the reference range printed on your own lab report, because methods differ between laboratories.

What High DHT Means

Elevated DHT can contribute to several conditions. In men, high DHT activity is linked to male pattern baldness and benign prostatic hyperplasia (an enlarged prostate). In women, raised DHT may point to androgen excess from conditions such as polycystic ovary syndrome, and can cause acne, unwanted hair growth, or scalp thinning.

High DHT can also reflect testosterone therapy or supplements that raise the amount of testosterone available for conversion. Because symptoms depend on tissue sensitivity as well as blood levels, two people with the same DHT number can look quite different.

What Low DHT Means

Low DHT is most often seen in people taking finasteride or dutasteride, drugs that block 5-alpha reductase and are prescribed for hair loss or prostate enlargement. A large drop in DHT on these drugs is the expected effect, not a lab error.

Low DHT can also occur with low testosterone production, pituitary disorders, or with aging. Some people report sexual side effects when DHT falls sharply, so changes in medication should always be discussed with the prescribing clinician rather than made on the basis of a lab number alone.

How to Order a DHT Test and Where to Get Tested

You can order a DHT test in two main ways. The traditional route is a clinician order followed by a blood draw at a hospital or clinic lab. The faster route is direct-access lab testing: you order the test online, visit a nearby collection site for the draw, and receive results in a secure portal, usually within a few business days.

Consider adding total testosterone and a broader hormone panel to the same order so your clinician can interpret DHT in context. Bring your medication and supplement list to the draw, since biotin and hormone products can affect some assays.

How Much Does a DHT Test Cost?

Direct-access DHT testing commonly costs between about $70 and $150, depending on the lab and whether it is bundled with testosterone or other hormones. A standalone DHT test sits at the lower end of that range, while a full male or female hormone panel costs more but gives far more context per dollar.

Insurance coverage varies, and many people pay out of pocket for direct-access testing to skip the office visit. Compare what is included in each panel before you order, and confirm whether the quoted price covers both the lab analysis and the collection fee.

Factors That Can Shift DHT Results

Several everyday factors can move DHT up or down. Testosterone therapy, DHEA, and some hair loss supplements raise the raw material for conversion, while finasteride and dutasteride sharply lower it. Biotin in multivitamins and hair formulas can interfere with certain lab assays, so check whether your order asks you to pause it before the draw.

Age, body weight, and time of day also play smaller roles. Testosterone peaks in the morning, and DHT roughly follows. For the most comparable results over time, test at a similar hour, keep medications steady, and use the same laboratory when you recheck.