DL-Cystine is widely used in the food industry as a nutritional supplement to enhance the protein content in various products, including dietary supplements and health foods. It plays a crucial role in promoting healthy hair, skin, and nails, making it a common ingredient in cosmetic and personal care products. In the pharmaceutical sector, DL-Cystine is utilized in medications aimed at treating conditions related to cysteine deficiency, such as liver disorders and certain metabolic diseases. Additionally, it serves as a stabilizer in the production of certain drugs and vaccines, ensuring their efficacy and longevity. In agriculture, DL-Cystine is incorporated into animal feed to improve growth and overall health of livestock. Its antioxidant properties also make it valuable in various industrial applications, where it helps in preventing oxidative degradation of materials.