L-Methionine is an essential amino acid, containing sulfur, and must be provided for the body through your diet. High sources of L-Methionine include, cheese, eggs, fish, meat and poultry. L-Methionine is important to the growth of the body, aids the live in processing fat and aids the metabolism process. There are many benefits to having the proper amount of L-Methionine in the body. Please consult a health care professional before using.