This blood test is ideal for men who would like a comprehensive understanding of their testosterone levels and how it relates to other key hormones. Recommended for those considering testosterone replacement therapy.
Blood panel includes the following results:
Free and bioavailable testosterone: Most of the testosterone in blood attaches to two proteins- albumin (30-40%) and sex hormone- binding globulin.(SHBG -65%) The remaining testosterone, approximate 1-2% that is not attached to anything is the free testosterone. Bioavailable testosterone is a measure of free testosterone combined with testosterone bound to albumin.
The bio-available testosterone plays a key role because it is the level that the body has available for use to enter a cell and activate the receptor. When testosterone is bound to SHBG, it can’t jump off and do its job on the target tissue.