L-Cystine is widely used in the pharmaceutical industry as a nutritional supplement to support the synthesis of proteins and antioxidants in the body. It plays a crucial role in promoting healthy skin, hair, and nails by aiding in the production of keratin. In medicine, it is utilized to treat conditions like cystinuria, where it helps reduce the formation of cystine stones in the kidneys. Additionally, L-Cystine is incorporated into dietary supplements to boost immune function and enhance recovery after physical exertion. Its antioxidant properties also make it a valuable ingredient in skincare products, where it helps combat oxidative stress and improve skin elasticity. In the food industry, it is used as a dough conditioner to improve the texture and quality of baked goods. Furthermore, it is employed in animal feed formulations to support growth, health, and tissue repair in livestock.