L()-Ornithine hydrochloride is primarily used in the field of medicine and health supplements. It plays a significant role in the urea cycle, aiding in the detoxification of ammonia in the body, which is crucial for individuals with liver disorders or those experiencing high levels of ammonia. Additionally, it is often included in formulations aimed at improving athletic performance and recovery, as it helps reduce fatigue and enhance energy production. In the cosmetic industry, it is utilized for its skin-rejuvenating properties, promoting collagen synthesis and improving skin elasticity. Furthermore, it is sometimes incorporated into dietary supplements to support overall metabolic health and muscle maintenance.