Glycine is the simplest amino acid, featuring a hydrogen atom as its side chain. It is a non-essential amino acid involved in protein synthesis, collagen formation, and as a neurotransmitter in the central nervous system. In food science, glycine contributes to sweet taste profiles and is present in gelatin and other proteins. It serves as a precursor for creatine, glutathione, and heme. Highly soluble in water, it is used as a food additive for flavor enhancement and in nutritional supplements. Glycine exhibits zwitterionic behavior in solution and is stable under normal conditions but decomposes at high temperatures.