DL-Methionine sulfoxide is primarily utilized in the field of biochemistry and nutrition research. It serves as an important compound in studying oxidative stress and its effects on proteins and amino acids. Researchers use it to investigate the mechanisms of protein oxidation and the role of methionine residues in protecting cells from oxidative damage. Additionally, it is employed in the development of dietary supplements and formulations aimed at improving antioxidant defenses in biological systems. In the agricultural sector, it is explored as a potential feed additive to enhance the nutritional value and oxidative stability of animal feeds. Its applications also extend to the cosmetic industry, where it is studied for its potential to mitigate oxidative damage in skin care products.