A member asked:

Dear sir, my testosterone is 400 ng/dl. please tell me about free testosterone?

3 doctors weighed in across 2 answers
Dr. Ira Katz answered

Specializes in Endocrinology

It Depends: Testosterone is a diff test to interpret and should only be checked if there are symptoms.It can also be affected by many probs espec psych conditions and the meds to treat them.There are must ways to measure free testosterone and they often do not correlate.FTI and Bioavail T are prob best.All measures vary week,DO NOT RELY ON 1 TEST.See a good endocrinologist with exp before tx. ncbi.nlm.nih.gov

Answered 8/7/2015

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Dr. Charles Gordon answered

Specializes in Adolescent Medicine

Complicated: The way you measure it in the laboratory will give you different results so interpretation is based on that. Testosterone is carried in the blood bound to a sex hormone binding globulin (SHBG) and the only bio active form is the Free testosterone. Various conditions male it go up and down, Speak to your doc about it.

Answered 8/7/2015

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