I’m not convince of this idea that high SHBG lowers FT. I can’t see a mechanism where this would be the case. Androgens lower SHBG, so low levels of androgens would see a rise in SHBG, and may be more than one factor increasing SHBG, like improvements in insulin sensitivity through fasting or starvation.
I should have been more clear with a robust TT 584 ng/dL and high SHBG his cFT would be at the bottom end.
SHBG inflating his TT.