Testing at Quest Diagnostics you can land you at the top end of the ranges, at LabCorp, the same sample of blood gets you midrange. The Free T testing at this time is poorly defined, and therefore Free T testing is problematic to which the CDC is attempting to address.
The high creatine and low GFR points to kidney function problems. Renal failure is associated with decreased LH production, A reduction in clearance rate of prolactin leads to hyperprolactinemia that can inhibit LH production and in turn lead to decrease in testosterone production.
There’s the million dollar question, I’m afraid you’re going to end up playing the doctor lottery. There aren’t enough doctors out there that truly specialize in TRT/HRT, many make the claim but fall short of hitting the mark.
TRT or sex hormones isn’t taught in mainstream medical schools and residency. Often times men are told there levels are normal, when in fact no one can agree on what is normal.
Low-T clinics to the rescue. A lot of men have to go this route, who were told there normal, only to respond very well to TRT/HRT.