Testosterone, Free and Weakly Bound, With Total Testosterone

Free and weakly bound testosterone (FWBT), also referred to as bioavailable testosterone, is thought to reflect an individual's biologically active, circulating testosterone. Helpful in assessing testicular function in males and managing hirsutism, virilization in females.
This Testosterone test will provide exact levels of Total Testosterone results ranging from 0-9,999. However, any value greater than 9,999 will show >10,000 (over 10,000) as a result instead of the exact number.

Significant deviations from the normal range may require further evaluation by your physician.

Free and weakly bound testosterone (FWBT), also referred to as bioavailable testosterone, is thought to reflect an individual's biologically active, circulating testosterone. FWBT includes free testosterone and testosterone that is bound to albumin. FWBT does not include sex hormone-binding globulin-bound testosterone. The SHBG-bound fraction is biologically inactive because of the high binding affinity of SHBG for testosterone. The rapid dissociation of "weakly bound" testosterone from albumin results in the availability of essentially all albumin-bound testosterone for steroid-receptor interaction.