Dihydrotestosterone (DHT) Biomarker Testing
A DHT test measures a potent androgen linked to hair, skin, and prostate effects; order through Vitals Vault with Quest lab access and PocketMD help.
With Vitals Vault, you have access to a comprehensive range of biomarker tests.
Dihydrotestosterone (DHT) is a powerful androgen made from testosterone. Even when your testosterone looks “normal,” DHT can be the hormone that better matches what you notice in your hair, skin, or prostate-related symptoms.
A DHT blood test is most useful when you are trying to connect symptoms to androgen activity, or when you are monitoring a treatment that changes how testosterone is converted to DHT. Your result is one data point, so it is best read alongside related hormones and your clinical history.
Because labs use different methods and reference intervals, the most meaningful way to interpret DHT is to compare your number to the range printed on your report and to trend it over time using the same lab when possible.
Do I need a Dihydrotestosterone test?
You might consider a DHT test if you have signs that suggest higher or lower “androgen effect” than your other hormone results would predict. Common reasons include scalp hair thinning (androgenic alopecia), acne or oily skin, increased facial or body hair growth, or concerns about prostate enlargement symptoms such as weaker urine stream or increased nighttime urination.
A DHT test can also be helpful if you are already tracking testosterone and still feel like the picture is incomplete. For example, two people can have similar testosterone levels but very different DHT levels because of differences in 5‑alpha reductase activity (the enzyme that converts testosterone to DHT).
You may also want this test if you are monitoring medications or therapies that intentionally change DHT, such as 5‑alpha reductase inhibitors, certain hormone regimens, or clinician-directed treatment plans for hair loss or androgen-related symptoms.
Testing supports clinician-directed care and shared decision-making. It cannot diagnose a condition on its own, but it can clarify whether DHT is likely contributing to what you are experiencing.
DHT is measured from a blood sample in a CLIA-certified laboratory; results should be interpreted with your clinician because ranges and methods can vary by lab.
Lab testing
Ready to order a DHT test and track your trend over time?
Schedule online, results typically within about a week
Clear reporting and optional clinician context
HSA/FSA eligible where applicable
Get this test with Vitals Vault
Vitals Vault lets you order a DHT blood test directly, so you can move from “I’m not sure what’s driving this” to a concrete data point you can discuss with your clinician.
After your results are in, PocketMD can help you understand what DHT does, how your value compares with the reference interval on your report, and which companion labs often add context (such as testosterone, SHBG, and estradiol). That way you are not interpreting a single number in isolation.
If you are making a change that could affect DHT, Vitals Vault also makes it easy to retest and trend your results over time using the same lab network for more consistent comparisons.
- Order online and test through the Quest network
- PocketMD guidance to help you interpret results in context
- Easy retesting to track trends over time
Key benefits of Dihydrotestosterone testing
- Clarifies androgen activity when testosterone alone does not match your symptoms.
- Helps evaluate patterns linked to hair thinning, acne, and oily skin.
- Adds context for unwanted hair growth or other signs of androgen excess.
- Supports monitoring of therapies that reduce DHT conversion (5‑alpha reductase pathway).
- Improves interpretation of total and free testosterone by showing downstream conversion.
- Helps you and your clinician decide which follow-up labs matter most (SHBG, estradiol, LH/FSH).
- Makes it easier to trend hormone changes over time when you retest through the same lab network.
What is Dihydrotestosterone?
Dihydrotestosterone (DHT) is an androgen hormone made primarily by converting testosterone into DHT through an enzyme called 5‑alpha reductase. DHT binds more strongly to androgen receptors than testosterone, so it can have a bigger biological effect even at lower concentrations.
DHT plays a normal role in sexual development and adult androgen signaling. In adults, it is commonly discussed because of its effects on hair follicles, skin oil production, and prostate tissue. Your DHT level reflects both how much testosterone is available to convert and how active the conversion pathway is in your body.
A blood DHT test measures circulating DHT. That does not perfectly capture what is happening inside specific tissues (like scalp or prostate), but it can still be a useful marker when interpreted alongside related hormones and symptoms.
How DHT relates to testosterone and SHBG
Testosterone is the upstream hormone, and some of it is converted into DHT. Sex hormone–binding globulin (SHBG) affects how much hormone is bound versus available, which can change how you interpret total hormone levels. Looking at DHT together with total testosterone, free testosterone (or calculated free), and SHBG often gives a more complete picture than any single test.
Why DHT is linked to hair and prostate symptoms
In genetically susceptible scalp follicles, DHT signaling can contribute to miniaturization of hair follicles over time, which shows up as patterned thinning. In prostate tissue, DHT can stimulate growth and may relate to benign enlargement symptoms. These links are not one-to-one, but they explain why DHT is often checked when symptoms cluster in these areas.
What do my Dihydrotestosterone results mean?
Low Dihydrotestosterone levels
A low DHT result can occur when overall androgen production is low, when conversion of testosterone to DHT is reduced, or when you are using a therapy that blocks the 5‑alpha reductase pathway. Depending on your situation, low DHT may align with lower libido, reduced body hair, or other low-androgen symptoms, but many people have no obvious symptoms. If your DHT is low while testosterone is also low, your clinician may look upstream at pituitary signals (LH and FSH) and overall health factors that affect hormone production.
In-range (optimal) Dihydrotestosterone levels
An in-range DHT result suggests your circulating DHT is consistent with the lab’s reference interval for your age and sex. If you still have symptoms, the next step is usually context rather than assuming DHT is “not involved.” Your clinician may compare DHT with total and free testosterone, SHBG, and estradiol, and may also consider non-hormonal contributors such as iron status, thyroid function, inflammation, or dermatologic conditions.
High Dihydrotestosterone levels
A high DHT result can reflect higher testosterone availability, increased conversion to DHT, or both. It may fit with androgen-driven symptoms such as acne, oily skin, scalp hair thinning, or unwanted hair growth, although symptoms depend on tissue sensitivity and genetics. If your DHT is high, it is often helpful to review the full androgen picture (testosterone, SHBG, and sometimes DHEA-S) and to discuss whether medications, topical hormones, or supplements could be contributing.
Factors that influence Dihydrotestosterone
Medications are a common driver of changes in DHT, especially drugs that inhibit 5‑alpha reductase or hormone therapies that change testosterone levels. Age, sex, and body composition can shift androgen patterns over time, and genetics can affect how strongly tissues respond to a given DHT level. Timing and consistency matter too: if you are trending results, try to test at a similar time of day and under similar conditions. Finally, lab method differences can affect measured DHT, so comparing results from the same lab is usually the cleanest way to track change.
What’s included
- Dihydrotestosterone
Frequently Asked Questions
What is a DHT blood test used for?
A DHT blood test measures dihydrotestosterone in your blood to help assess androgen activity. It is often used when symptoms suggest androgen effects (such as acne, oily skin, scalp hair thinning, or unwanted hair growth) or when you are monitoring a treatment that changes DHT production.
Do I need to fast for a DHT test?
Fasting is not typically required for a DHT blood test. If you are combining DHT with other labs (like lipids or glucose), follow the preparation instructions for the full set of tests you are ordering.
What is the normal range for DHT?
“Normal” depends on the lab method, your age, and your sex, so the most reliable reference is the interval printed on your report. When you are monitoring change, using the same lab and comparing your result to your prior results is often more informative than comparing to a generic range online.
Can you have normal testosterone but high DHT?
Yes. DHT is made from testosterone, but the conversion rate varies between people. You can have testosterone in range and still have higher DHT if your 5‑alpha reductase activity is higher or if more testosterone is available for conversion.
What tests should I check with DHT for better context?
Common companion tests include total testosterone, free testosterone (or calculated free), SHBG, and estradiol. Depending on your symptoms, your clinician may also consider DHEA-S, LH, FSH, prolactin, thyroid labs, and iron studies to rule in or out other contributors.
How soon should I retest DHT after starting or stopping a therapy?
Retest timing depends on what changed and why, but many clinicians recheck hormones after several weeks to a few months to allow levels to stabilize. If you are trending, try to keep conditions similar (time of day, same lab) and review the plan with your clinician.