Most of us remember learning about peptides in school, but not many remember what they do for the body. It never seemed relevant to remember, right? Wrong. Peptides are an important part of our daily lives and habits. Peptides, in terms of typical nutrition that most people will come into contact with, are protein supplements. They give you the same kind of benefits that protein does. As such, it is a very important part of bodybuilding and fitness. There are a few things that you need to know before you buy peptides.