Dl-methionine is the combined product of l-methionine and d-methionine. This is considered an essential amino acid and is necessary in the synthesis of s-adenosylmethionine. The reason that the body needs methionine is that it helps produce cysteine and taurine. The body also uses these sulfur compounds to help develop the hair, nails and skin. Sulfur also aids the kidneys in getting rid of metallic toxins present in there. Methionine facilitates the body's protein synthesizing functions, particularly in the case of muscle protein. Methionine also provides the body with much needed sulfur which is necessary for the body to produce energy. Methionine helps to break fats down and keeps the digestive system well supported.