Total T
The combined amount of testosterone circulating in your blood — bound and unbound.
What is it
Total testosterone measures the sum of all forms of testosterone in circulation, including testosterone bound to SHBG, bound to albumin, and free (unbound). It is the most commonly ordered testosterone measurement.
Why it's measured
Total testosterone has been associated with energy, libido, body composition, and mood in published research on male and female endocrine health. It is foundational to evaluating androgen status but can be incomplete without free testosterone and SHBG.
Reference range
Standard laboratory reference
Men: 300 – 1,000 / Women: 15 – 70 ng/dL
Reference ranges vary by laboratory. Your individual reference range will appear on your test report and should be interpreted by your physician in the context of your overall health profile.
What results may indicate
Elevated
Has been associated with PCOS in women and warrants clinical evaluation. In men, may reflect supplementation or rarely endogenous production.
Lower
Has been associated with low libido, fatigue, mood changes, and altered body composition in published research.
These associations are general. They are not a personal diagnosis or prediction. Discuss your individual results with your physician in the context of your full health profile.
When it's measured
Often measured in the morning when levels peak. Frequency depends on symptom evaluation, age, and treatment context.
Related markers
Measured in
A complete look at your heart, hormones, metabolism, inflammation, and longevity systems — drawn at Quest or LabCorp, reviewed by a U.S.-licensed physician.
Explore the Apex Panel →This information is for general educational purposes only and is not medical advice. Lab results alone are not intended to diagnose, treat, or cure any condition and do not replace the advice of a healthcare provider. OPTML does not offer medical advice, a diagnosis, medical treatment, or any form of medical opinion.