DL-Methionine Sulfoxide is utilized in various biochemical and pharmaceutical applications due to its role in oxidative stress studies. It serves as an important marker for protein oxidation, helping researchers understand the impact of oxidative damage on proteins and cellular functions. In the field of nutrition, it is studied for its potential effects on metabolic pathways and its role in modulating oxidative stress in biological systems. Additionally, it is explored in the development of therapeutic agents aimed at mitigating oxidative damage-related diseases. Its application extends to cosmetic formulations, where it is investigated for its antioxidant properties to protect skin cells from oxidative stress and aging.