Compare this test’s laboratory options
Dihydrotestosterone, Free, Serum
Quest Diagnostics1 test optionFrom $61.55
Dihydrotestosterone, Free, Serum
Quest DiagnosticsCatalog information reviewed: August 24, 2026 by the Sunridge Medical clinical team.
What this laboratory test evaluates
DetailsDihydrotestosterone, Free, Serum – This test measures the level of dihydrotestosterone (DHT) in the blood, which is crucial for diagnosing conditions like 5-alpha-reductase deficiency that affects male sexual development. It's also used to monitor the effectiveness of treatments that impact androgen levels. DHT is a key androgen involved in the development of male external genitalia, prostate growth, and skin health. It's mainly produced from testosterone through the action of 5-alpha-reductase in tissues.
Who might need this test?Doctors might order this test for individuals showing signs of abnormal male sexual development or to evaluate treatment effects on androgen levels. Symptoms and conditions leading to the test include: • Underdeveloped male genitalia
• Prostate health concerns
• Changes in skin condition
What type of sample is required for this test?1.5 mL of serum collected in a red-top tube (no gel) is needed for this test.
Understanding Your ResultsInterpreting the results requires considering clinical history, family history, and physical examination findings. While DHT levels are crucial for certain diagnoses, they should be viewed as part of a comprehensive assessment.
Note:Recent studies suggest that high DHT levels may not directly increase the risk of prostate issues, challenging previous beliefs. Always discuss your test results with your healthcare provider for accurate diagnosis and treatment planning.
Additional test information
Doctors might order this test for individuals showing signs of abnormal male sexual development or to evaluate treatment effects on androgen levels. Symptoms and conditions leading to the test include underdeveloped male genitalia, prostate health concerns, changes in skin condition.
Collection and processing
- Sample type: Serum
- Fasting: No
- Estimated laboratory processing: Results should be available in 2 – 5 business days after the sample is collected
How Sunridge uses laboratory information
Sunridge considers the medical question, symptoms, history, medications, prior results, and whether the finding could change care before recommending testing. A laboratory result is not interpreted in isolation and does not establish a diagnosis by itself.
Before requesting this test
Availability, collection requirements, eligibility, and processing estimates can change. Sunridge reviews each request and, when appropriate, creates the order through Fullscript. Follow the current instructions supplied with the approved order.
Common questions about this laboratory test
- What sample does this test require?
- The listed sample type is Serum. Confirm current collection instructions in the approved order.
- Does this test require fasting?
- The current catalog record lists fasting as: No. Follow the instructions supplied with the approved order.
- How long does laboratory processing usually take?
- Results should be available in 2 – 5 business days after the sample is collected. Timing can change after collection or if a laboratory requires additional review.
About this test
DetailsDihydrotestosterone, Free, Serum - This test measures the level of dihydrotestosterone (DHT) in the blood, which is crucial for diagnosing conditions like 5-alpha-reductase deficiency that affects male sexual development. It's also used to monitor the effectiveness of treatments that impact androgen levels. DHT is a key androgen involved in the development of male external genitalia, prostate growth, and skin health. It's mainly produced from testosterone through the action of 5-alpha-reductase in tissues.
Who might need this test?Doctors might order this test for individuals showing signs of abnormal male sexual development or to evaluate treatment effects on androgen levels. Symptoms and conditions leading to the test include: • Underdeveloped male genitalia
• Prostate health concerns
• Changes in skin condition
What type of sample is required for this test?1.5 mL of serum collected in a red-top tube (no gel) is needed for this test.
Understanding Your ResultsInterpreting the results requires considering clinical history, family history, and physical examination findings. While DHT levels are crucial for certain diagnoses, they should be viewed as part of a comprehensive assessment.
Note:Recent studies suggest that high DHT levels may not directly increase the risk of prostate issues, challenging previous beliefs. Always discuss your test results with your healthcare provider for accurate diagnosis and treatment planning.
Additional details
Doctors might order this test for individuals showing signs of abnormal male sexual development or to evaluate treatment effects on androgen levels. Symptoms and conditions leading to the test include underdeveloped male genitalia, prostate health concerns, changes in skin condition.
Highlighted health areas
- Women's health
- Hormones
- Men's health
Biomarkers and report focus
The exact analytes and report format can change. Confirm the current contents in the Fullscript order before payment.
- Dihydrotestosterone
- Dihydrotestosterone, Free