NOW Foods L-Methionine 500 mg is a dietary supplement providing L-Methionine, an essential amino acid that the body cannot produce on its own and therefore must be obtained through the diet. Methionine plays an important role in protein synthesis and supports various metabolic processes in the body. It also contributes to the production of important compounds involved in cellular function and antioxidant defense. Each capsule provides 500 mg of L-Methionine in a convenient format for daily nutritional support.