Peptides are short chains of amino acids, the building blocks your body uses to make proteins. They act like chemical messengers and can affect appetite, blood sugar, tissue repair, inflammation, and immune signaling. Some are approved drugs. Some are used in compounding. Some are still early research and should be treated that way. If you want to get into the regulation history behind them, read Intro to peptides. If you want the Russian backstory, read Peptide and Bioregulator Science. If you want one of the compounds people ask about most, read BPC-157. If you want the short recent history behind the peptide craze, read Peptides are such a buzz. Do you have questions?.