How to measure testosterone accurately: The blood tests that actually matter
Dr. Alexander Grant, MD, PhD: Urologist & Men's Health Advocate
Dec 10, 2025 · 14 min read
You measure testosterone most accurately with a morning blood test that reports total testosterone and free testosterone, ideally processed by a CLIA certified laboratory. The details matter, because timing, test type, and follow up labs can be the difference between useful data and a false alarm. “If you want to know how to measure testosterone ...