Peptides are short chains of amino acids that act as essential signaling molecules in the body. They help regulate key processes such as hormone balance, tissue repair, metabolism, immune response, and communication between the brain and body. Because peptides work with the body’s natural systems, they play an important role in maintaining balance, recovery, and overall function. In this discussion, Andrew D. Huberman, a neuroscientist at Stanford University, explains what peptides are, how they function in the body, and why they’ve become part of broader conversations in clinical medicine and popular culture.