LabPreparation

Hormone

How to Prepare for a Dihydrotestosterone (DHT) Blood Test Blood Test

  • Blood draw
  • Hormone
  • Prep checklist included

At a glance

Dihydrotestosterone (DHT) Blood Test Blood Test: prep snapshot

Sample type
Blood draw
Fasting
Fasting is usually not required for a DHT blood test, but some labs may have specific…
Best collection time
There is no strict timing requirement for a DHT blood test, but some clinicians prefer morning…
Typical turnaround
Varies by collection lab
Category
Hormone

A Dihydrotestosterone (DHT) Blood Test is usually quick, and most of the work is in the preparation: timing, fasting, and a short checklist. The DHT blood test measures levels of dihydrotestosterone, a potent androgen hormone.

Dihydrotestosterone (DHT) Blood Test: what it measures

The test measures the concentration of dihydrotestosterone in the blood. DHT is a potent androgen produced from testosterone and is involved in male pattern baldness and masculine characteristics. Results reflect circulating DHT levels at the time of collection.

  • Dihydrotestosterone (DHT)
  • Androgen activity
  • Male pattern baldness marker
  • Masculine characteristics

Preparation checklist for the Dihydrotestosterone (DHT) Blood Test

In most cases nothing extra is needed for this test. Ask the testing location about any timing or fasting instructions before your visit.

  1. Ask the collection lab whether any fasting is required for this test.
  2. Confirm whether a specific time of day is preferred for the blood draw.
  3. Tell the lab about any medications or supplements you take, as some may affect hormone levels.
  4. Bring a list of your current medications and your test order to the appointment.
  5. Follow any additional instructions provided by your clinician or the collection site.

Fasting, timing, sample type, and what to bring

Fasting

Fasting is usually not required for a DHT blood test, but some labs may have specific instructions. Confirm with your lab before your visit.

Best time to collect

There is no strict timing requirement for a DHT blood test, but some clinicians prefer morning collection when hormone levels may be most consistent. Follow the timing guidance provided by your lab or clinician.

Sample type

Blood draw. The collector will explain the process before starting.

What to bring

  • Your printed lab order or requisition form — the ordering physician prepares it for you after you order, and you print it (or fax it from your account) before visiting
  • Your order confirmation email, in case the collection site asks to see it
  • Water to drink before the draw and a light snack for afterward, if your test requires fasting
  • A government-issued photo ID (most collection sites verify identity at check-in)
  • A written list of the medications and supplements you currently take
  • A short-sleeved or loose-sleeved shirt for an easy blood draw

You do not need an insurance card or a payment method at the collection site: the lab does not bill insurance, and you pay at order time, so there is no copay or deductible. The lab also provides the physician's requisition, so you do not need a separate doctor's referral.

Order process and what-to-bring details reflect the lab's published instructions, paraphrased in our own words. Confirm final requirements with the collection lab that will perform your draw.

What the collection involves

A healthcare professional draws a small sample of blood from a vein, usually in your arm. The sample is sent to a laboratory for analysis, and the procedure typically takes only a few minutes.

Details worth confirming with the collection lab before your visit:

  • Does this test require fasting or any timing restrictions?
  • What medications or supplements should I avoid before the test?
  • When can I expect my results and how will they be shared?

Why the Dihydrotestosterone (DHT) Blood Test may be ordered

A clinician may order a DHT blood test to evaluate androgen activity in men, particularly when investigating male pattern baldness or other conditions related to masculine characteristics. It can also help assess whether DHT levels are within an expected range.

Understanding your results

Reference ranges for DHT can vary between laboratories due to differences in testing methods and equipment. Your results should be interpreted by your clinician using the range provided by the performing lab.

General test information is compiled from publicly available reference material, including MedlinePlus (medlineplus.gov) and the Centers for Disease Control and Prevention (cdc.gov), and is reviewed for clarity. Preparation and what-to-bring details reflect the lab's published instructions, paraphrased into our own words. Preparation instructions, timing, and pricing vary by collection lab — always confirm them with the lab that will perform your draw.

Common questions

Frequently asked questions

Do I need to fast for a DHT blood test?

Fasting is usually not required, but some labs may have specific instructions. Confirm with your lab before your visit.

How long does it take to get DHT test results?

Turnaround time is typically 1 to 3 business days, though it may vary by laboratory.

What can affect my DHT test results?

Medications, supplements, and the time of day of collection can influence hormone levels. Tell your clinician and lab about anything you are taking.

Is a DHT blood test painful?

It involves a standard blood draw from a vein, which may cause brief discomfort. The collection usually takes only a few minutes.