CoastWatcher
Moderator
I'm not sure it's crucial, though. Knowing your total T, free T, and your hematocrit would be crucial while on TRT. Knowing SHBG doesn't seem to be crucial. And it's not an inexpensive test.
If SHBG is low, particularly if it is dramatically low, you and your doctor will need to consider how many injections a week, and how much testosterone you need to inject, are necessary to reach success. SHBG indirectly impacts your estradiol. Not by direct action, but in terms of how quickly you are clearing/injecting testosterone and thus spiking E2. It's a vital measure to reference.