L-methionine is a precursor to L-cysteine. L-cysteine itself may have antioxidant activity. L-cysteine is also a precursor to the antioxidant glutathione. Antioxidant activity of L-methionine and metabolites of L-methionine appear to account for its possible anti-hepatotoxic activity.
Brain death, Increased homocysteine in blood, Brain injury, Cardiac disorder
L-Methionine is used in the treatment of nutritional deficiencies.