I am not a BB and have no experience with this stuff. I have a friend who is a competitive BB for 30-40 years. In his late 60s and looks like a jacked stud still. He mentioned his trainers have him on contest prep T3 and Clen, and it made me worried. I am not aware of any health issues he has, but at his age feel like messing with thyroid or clen is not worth losing a tiny bit of bodyfat for any potential risks to his longevity. My only exposure to clen was guys in college football way back in the day taking it to "get ripped" or preserve muscle during the off season, and some of them said doing sprints on it made them feel like they would have a heart attack so got off it ASAP.
Any input I can give him from those of you more in the know about this? Just me acting concerned got him worried and I think he would get off if I found anything out that it was a risk. He has done it in the past with no issues he said but why risk it at this stage in life.
Thanks for any feedback or resources I can point him towards. I have skimmed threads about T3 and clen, seems many people love it and others do think its risky. I am not a BB so not in the loop on cutting for contests.