L-Lysine hydrochloride is widely used in the food industry as a nutritional supplement to fortify products, particularly in cereals, baked goods, and beverages. It helps address lysine deficiencies in diets, especially in regions where staple foods like rice or wheat are low in this essential amino acid. In animal feed, it is added to enhance the growth and development of livestock, poultry, and aquaculture species by improving protein synthesis and overall health. Additionally, it is utilized in pharmaceutical formulations to support immune function, promote tissue repair, and aid in the recovery from illnesses or surgeries. Its role in skincare products includes improving collagen production and skin elasticity, making it a common ingredient in anti-aging and moisturizing formulations.