Thanks for that! A lot to read, but I did find a summary of that study that mentioned the results in a percentage of ITT. Like " 250 IU SC every other day along with TRT their intratesticular testosterone levels only dropped 7%." The hard part is figuring out what effect that has on total or free T. I saw something somewhere that mentioned an ITT of 1130ish in guys with a total T much lower...like 500ish if I remember correctly. Makes sense that T would be higher when measured in the T factory.