Dipeptides are simple molecules formed by two amino acids linked together by a peptide bond. Amino acids are the building blocks of proteins, and when two of them combine, they create a dipeptide. This process occurs through a dehydration reaction, where a water molecule is released. Dipeptides play important roles in biological processes, including protein synthesis and metabolism. They can be found in various foods and are also produced in the body during the breakdown of proteins. Understanding dipeptides is essential for studying proteins, nutrition, and biochemistry.