Learn this stuff (below) if you are going on TRT/TOT and don’t want to be perpetually in the dark. You may learn it and then not decide to go on. Either way you should understand the fT situation and be able to convert and compare the various fT assay results. Think of this as free Testosterone 101. Not many understand it properly. Also I recommend never throwing out a number without a unit(s) behind it and understanding what type of assay the number and unit(s) come from.