Peptides are tiny proteins that your body makes naturally. Think of them as messengers — they tell different parts of your body what to do. For example, some peptides help your body heal, some help with sleep, and some help control your appetite and weight.
Peptide therapy uses copies of these natural messengers to help your body work better. The peptides used in therapy are made in a pharmacy and are given as small injections under the skin, similar to how insulin is given.