Weight-loss drug found to shrink muscle in mice, human cells

Some of the side effects of semaglutide are just a result of eating less calories.

Without a control group who also ate the same amount of calories but without the drug, it's hard to know if the side effect were directly caused by semaglutide or just a result of being in a calorie deficit.

well it does lead to less eating so it indeed a side effect. if control group ate the same amount there would be no weight loss to begin with.