DL-Methionine is an essential amino acid containing Sulphur. The racemic mixture of D and L-isomers forms DL-methionine, which is the commercially available methionine. DL-Methioninehas been used to study its effect on the growth and feed utilization of Niletilapia. It has also been used as a part of standard diet in animal models. Methionine offers protection against disorders related to hair, skin and nails. It is also known to induce hair growth..