Widely used in animal feed as a source of methionine, supporting protein synthesis and growth. Enhances feed efficiency in poultry and swine. Commonly used in poultry diets to improve feathering, egg production, and weight gain. Also used in some medical nutrition products as an amino acid supplement. Employed in cell culture media to support cell growth. Helps maintain sulfur balance in metabolic processes. Used in the formulation of synthetic amino acid mixtures for dietary supplements. Supports antioxidant defense through its role in glutathione synthesis. Applied in research settings to study amino acid metabolism.