Free vs. Total Testosterone: What Is the Difference?

Understanding the numbers on a blood test and what they really mean.

Total testosterone measures everything in your blood. Free testosterone is the small fraction that isn't bound to proteins and is readily available to tissues.

Why it matters

Two people with the same total level can have different free levels. Discuss results with your doctor for a complete picture.

This article is general information only and isn't medical advice. Speak with a health professional before starting new supplements.

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