2-Amino-3-hydroxybutanoic acid, commonly known as threonine, is an essential amino acid widely used in biochemical and medical research. It functions as a building block in protein synthesis and is involved in key metabolic pathways, aiding studies on enzyme mechanisms, neurotransmitter production, and metabolic disorders. In pharmaceutical applications, it serves as an intermediate for synthesizing peptides, vitamins, and other bioactive compounds. Due to its chirality, it is valuable in producing enantiomerically pure drugs. In nutrition, it is incorporated into dietary supplements and animal feeds to maintain amino acid balance and support overall health. It also contributes to the development of biodegradable polymers and biocompatible materials.