Dr. Charles Mok explains why there's no blood test that predicts who'll benefit from testosterone replacement therapy. Doctors use symptom screening and trial-of-therapy instead, aiming for upper-normal levels and checking labs after treatment starts.
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What level predicts which men will benefit. There is no blood test or no blood level that will predict which men will benefit from testosterone replacement therapy. So if you're a man and you have symptoms of low T and you can go online and do something called an ADAM questionnaire and your symptoms are there, you can get a blood test done. But the way you determine is, you know, take testosterone replacement therapy if your doctor agrees with you and see if you feel better. If you do, that's your level and what level you bring it up to. Again, it's a guessing game. So, so we don't check a lot of post labs for testosterone. There's not a level that predicts where you'll feel the best. It's basically where you feel the best. Typically it's going to be in the upper limits of normal because your body makes little binding enzymes to bind up testosterone. So if your level is, let's say.