What Is Peptide?

Peptides are biological molecules composed of amino acids connected by peptide bonds formed through dehydration synthesis. While the distinction between peptides and proteins is not rigid, chains shorter than approximately 50 amino acids are generally classified as peptides. The human body produces thousands of endogenous peptides that regulate processes including growth, immune function, pain signaling, and metabolism. Research peptides are synthetic versions of these natural molecules or novel sequences designed to interact with specific biological targets. Their small size allows them to penetrate tissues more readily than larger proteins, making them attractive candidates for therapeutic research.