Testosterone Blood Test

A single-marker total testosterone measurement — the most commonly requested individual hormone test. Provides a baseline reading of this essential hormone that affects energy, mood, muscle mass, libido, and body composition in both men and women. While total testosterone alone does not tell the full story (SHBG and free testosterone add context), it is a practical and affordable starting point for anyone suspecting hormonal changes.

Testosterone is the most requested individual hormone marker for good reason — it influences energy, mood, muscle mass, bone density, libido, and body composition in both men and women. This single-marker test measures total testosterone, providing an affordable baseline before committing to a broader hormone panel. In men, testosterone declines by roughly 1-2% per year after age 30. Symptoms of low testosterone — fatigue, reduced motivation, difficulty building muscle, increased body fat, low libido — overlap with dozens of other conditions, making objective measurement essential. In women, testosterone is produced in smaller quantities by the ovaries and adrenal glands but plays an equally important role in energy, mood, and sexual function. Both elevated and low levels cause symptoms. Total testosterone alone does not tell the complete story. SHBG (sex hormone-binding globulin) binds most circulating testosterone, and only the unbound fraction is biologically active. A total testosterone result in the normal range can still mean low free testosterone if SHBG is elevated — common in women on oral contraceptives and men with liver conditions. For this reason, many practitioners recommend the Low Testosterone Panel or a comprehensive screen for a fuller picture. ClearLabs recommends a morning blood draw before 10am, as testosterone follows a circadian rhythm and peaks in the early hours. No fasting is required. Results are delivered within 2-3 business days through the ClearLabs dashboard, displayed against optimal ranges rather than just the standard laboratory reference interval.