from what i understand, the testosterone used in trt or steroids is bio-identical. thus it is the same chemical structure that we already produce. as far as the decline in other hormones as we age and rather trt will have undesirable effects. it's one of those yes and no answers. trt will affect the hypothalamus pituitary testicular axis. it will also aromatize, convert to estrogen. it can turn to dht as well, but there are treatments to help with that, which you may very well need to take even without trt. ultimately, trt is a personal chioce and each individual will have to decide rather it is right for them. don't let the doctor make your decision for you.