Methionine is an essential amino acid, the basic building blocks from which proteins in the body are constructed. Methionine cannot be produced in the body, & must be obtained from the diet or via supplementation; dietary sources include meat, fish, milk, cheese, peanuts & whole lentils. Significant losses of methionine may occur during food processing. Methionine supplementation of vegetarian diets may be appropriate in some cases. Methionine supports a normal metabolism & growth. In addition to helping maintain protein formation, methionine may support formation of:• Antioxidants protecting the body against free radicals• Chemical messengers responsible for normal brain function• Cartilage components in joints. In addition, methionine promotes healthy liver function, including detoxification.