Your TT is influenced by your SHBG levels which are predicted to be low if your FT lab testing is accurate.
Men with low SHBG have lower TT while men with high SHBG have high TT.
TRT will decrease SHBG is most cases. FT is where the rubber meets the road. TT is inactive, FT is the active portion of T.
I think you've already been given some great feedback in your other thread.
