Many men are turning to testosterone supplementation to boost flagging libido, lift their spirits, and improve their mental and physical performance. But blood tests for diagnosing "low T" are notoriously unreliable. Measuring total testosterone can produce misleading results in men with low-normal hormone levels. But by combining more than one kind of blood test, and by making sure to retest, your doctor can offer you a reasonably reliable diagnosis and possibly offer a short-term trial of testosterone to see if it makes you feel better.
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