Has he "come out" one way or another WRT pituitary hormone levels?
If the levels are unusually low, then medically monitored treatment to raise to normal levels appears to have no negative consequences, only positive ones, at all, at least with a short examination of wikipedia. Even boosting up to a bit on the high side of normal is probably medically sensible, if the patient has symptoms that correspond with excessively low levels.
There are bro-science uses, for weightlifting and some other things, which seem to cause significant health problems for people who overdose. Its rather like insulin, if you're chronically low you're in big trouble, but if the stuff were widely available OTC you'd have idiots overdosing on insulin all the time because if a little is good them surely an immense amount is many times better. that doesn't mean proper doctor supervised use of insulin by diabetics is inherently wrong, just because of a little bro-science that isn't relevant to an individual's medical treatment plan.