testosterone
1 Replies
bmm - November 26

Dear Dr. Jacobs -
Does it matter what CD testosterone levels are tested? Thank you

 

B. Jacobs, M. D. - November 27

In the circulating blood, there is a certain amount of testosterone. Some of it is bound, or tied up, by a protein - sex hormone binding globulin. The remainder is referred to as free testosterone. The free and bound testosterone are in an equilibrium state and the amount bound is determined by the amount of the binding globulin. The bound componant is not active, while the free componant does effect cells of your body. It is possible to measure the totoal, and bound, and, therefore, calculate the free testerone. It is the frre testosterone that is biologicly active.

 

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