A peptide is a short chain of amino acids, which are the building blocks of proteins. Peptides play a vital role in human health and can be found in many different parts of the body. They can act as hormones, neurotransmitters, and enzymes, and are involved in a wide range of physiological processes.
Peptides can act as messengers in the body, transmitting signals between cells and coordinating various bodily functions. For example, insulin, a well-known peptide, regulates blood sugar levels by signaling to cells to take up glucose from the bloodstream. Other peptides, such as growth hormone and erythropoietin, play important roles in growth and development.