Amino acids predominantly glycine and proline are key components of collagen hydrolysates and gelatin used in food applications. Glycine (2-aminoacetic acid) is the simplest amino acid with a non-polar side chain, while L-proline is a cyclic imino acid contributing to protein structure and stability. This mixture exhibits high water solubility due to zwitterionic forms, moderate solubility in alcohols, and negligible solubility in fats. They function as flavor enhancers, stabilizers, and nutritional supplements in spices and processed foods. Chemically stable under normal conditions, they participate in Maillard reactions during cooking. The combination is valued for its role in connective tissue health and as a source of non-essential amino acids in dietary applications.