L-Methionine is an essential amino acid that naturally occurs in protein-rich foods. The body cannot produce L-Methionine itself, so it must be obtained through diet or supplements.

L-Methionine is the natural L-form of the amino acid methionine. The synthetic DL-form is not biologically active.

L-Methionine is usually taken outside of meals so that there is no competition from other amino acids.

Essential amino acids cannot be produced by the body and must be obtained through diet. Non-essential amino acids can be produced by the body itself.

The amino acid methionine can be found in foods such as: Meat, poultry, fish, seafood, dairy products, eggs, nuts, and seeds.