L-Isoleucine is widely used in the pharmaceutical and nutraceutical industries as a dietary supplement to support muscle recovery and growth, particularly for athletes and individuals engaged in intense physical activity. It is an essential amino acid that plays a critical role in protein synthesis and energy regulation. In medical applications, it is incorporated into intravenous nutrition solutions for patients who cannot consume food orally, ensuring they receive necessary nutrients for recovery and maintenance of bodily functions. Additionally, L-Isoleucine is utilized in animal feed formulations to enhance growth and improve overall health in livestock. Its role in metabolic processes also makes it valuable in research studies focused on amino acid metabolism and related disorders.