Earlier quoted context omitted.
Lean mass is just non-fat mass. That includes much more than just muscle. I can't find any evidence that GLP-1 are catabolic to muscle mass. There is no evidence I can find that GLP-1s do anything above what calorie restriction does. There is a linear relationship between calorie restriction and fat loss down to under 10% body fat. There is so much wrong information on calorie restriction from studies done on people…
Yeah, I just went down a rabbit hole re-looking this up myself. It seems that there's nothing unique about semaglutide, and %FFM loss is just a function of how rapidly you lose weight. The most rapid losers on semaglutide have the same %FFM loss (30%) as bariatric patients, for example. And if you don't want to lose weight that fast, you can just temper the dose (unlike with bariatric surgery).
What worries me is if what if in 20 years of use, something with insulin gets blown out?
There is a chance it could be a drug for life like testosterone. We know though how devastating obesity is on health so it is really going to be up to the individual to take the risk. Not really my business at that level.