do collagen peptides help with weight loss?

From a compliance perspective, I need to warn brand owners: do NOT use the phrase “weight loss” on your packaging unless you want an FDA warning letter.
Dietary supplements cannot claim to treat obesity or cause direct weight loss. Instead, you should position your collagen products around “healthy weight management” or “supporting healthy body composition.” You can legally state that it “promotes satiety” or “supports lean muscle mass,” which appeals to the exact same demographic without crossing regulatory lines.

Directly causing fat loss like a stimulant? No. But as a tool for weight management, absolutely.
Collagen peptides are pure protein. Scientifically, protein has a high Thermic Effect of Food (TEF), meaning the body burns calories just to digest it. More importantly, clinical studies show that high-protein intakes stimulate the release of satiety hormones like GLP-1 and PYY. When consumers take a 15g scoop in the morning, it significantly reduces their appetite and sugar cravings throughout the day, which makes sustaining a caloric deficit much easier.