Enhance satiety
Collagen supplements can boost satiety. This is important because it helps manage hunger, which can lead to weight loss. The supplements may help reduce the number of calories you eat in a day. Studies show that proteins release hormones that boost satiety, such as cholecystokinin and glucagon-like peptide-1. Proteins also reduce the activity of hunger hormones, like ghrelin [4].
Studies also show that increased consumption of protein can boost thermogenesis. Increased thermogenesis can affect energy output and satiety. Increased consumption of protein can also increase protein anabolism [5]. This helps maintain lean muscle mass and boost its metabolism. Collagen supplements like gelatin can reduce hunger more than other proteins. It would help to know that protein is not a whole protein. That is, it lacks some amino acids your body needs. So, gelatin and collagen supplements cannot supply all the proteins your body needs. But they can improve satiety.