L-Lysine hydrate is widely used in the food and beverage industry as a nutritional supplement to enhance the protein content in various products. It is particularly beneficial in fortifying cereals, snacks, and dairy products, ensuring consumers receive adequate essential amino acids in their diet. In animal feed, it serves as a crucial additive to promote growth and improve overall health in livestock, poultry, aquaculture, and pets such as cats and dogs. Additionally, it is utilized in the pharmaceutical sector to formulate dietary supplements and medications aimed at supporting immune function, aiding calcium absorption, promoting bone health, and managing conditions like herpes simplex virus outbreaks by reducing frequency and severity. Its role in skincare products is also notable, where it aids in collagen synthesis, contributing to skin repair and anti-aging benefits. It further supports recovery after illness or intense exercise.