L-Cysteine is a naturally occurring amino acid that plays a crucial role in protein synthesis and various metabolic processes. It contains sulfur, which is important for the formation of disulfide bonds that help stabilize protein structures. L-Cysteine can be found in high-protein foods such as meat, eggs, and dairy products. In addition to its role in the body, L-Cysteine is also used as a dietary supplement and in some medical treatments. It is known for its antioxidant properties, which help protect cells from damage caused by free radicals. Furthermore, L-Cysteine is involved in the production of glutathione, a powerful antioxidant that supports overall health.