A dipeptide is a type of molecule formed when two amino acids are linked together by a peptide bond. Amino acids are the building blocks of proteins, and when they combine, they create a dipeptide, which is a small protein fragment. Dipeptides can play important roles in various biological processes, including metabolism and signaling. Dipeptides can be found in many foods and are important for human health. They can be produced during the digestion of proteins, breaking them down into smaller units that the body can easily absorb. Some common dipeptides include carnosine and glutathione, which have specific functions in the body, such as acting as antioxidants.