Description – Methionine (L-methionine) is a nutritional supplement as well as an essential amino acid found in food. Methionine is required for normal growth and repair of body tissues. Methionine is a sulfur-containing amino acid that improves the tone and elasticity of the skin, promotes healthy hair and strengthens the nails. Function – Methionine is found in meat, fish, and dairy products, and it plays an important role in many cell functions. Methionine is used to prevent liver damage in acetaminophen (Tylenol) poisoning. It is also used for increasing the acidity of urine, treating liver disorders, treatment of infections and for improving wound healing.