Testosterone Free [Mass/Vol]
Free testosterone is the active, unbound form of testosterone—the portion not tied up by SHBG or albumin. This is what actually interacts with androgen receptors and drives results: libido, muscle retention, motivation, energy, and recovery. You can have “normal” total T but feel off if your free T is low. It’s one of the most important markers for androgen status and performance.solve real problems with clean design and honest materials.
$37.50 USD