Some peptides help promote weight loss by helping to regulate blood sugar levels, metabolism, and appetite. These medications may cause side effects and people must have a prescription to take them.

"It is amazing because there are so many peptides in nature and they inspire us as scientists to modify them and make them even more potent and stable," Dr. Benfield said. "I am very proud of this ...

Before you jump in, however, it's crucial to understand the difference between collagen and collagen peptides -- because, yes, there is a difference. Here's everything you need to know.