This does not prove harm, but it does mean these are not simple, risk-free recovery supplements. Human studies don’t just have to show that thymosin beta 4, TB-500 or products sold under that name ...

For a growing number of middle-aged men, ageing no longer means surrendering to sagging skin, sore joints or slowing metabolism. Instead, it’s becoming a science experiment. The new frontier?

STAT is co-publishing this investigation by Undark. In the spring of 2024, Flynn McGuire started to notice glowing references online to an unapproved drug that proponents claimed could help the body ...