From the Manufacturer:
L-methionine is an essential sulfur-bearing amino acid. In the body, it converts to L-cysteine and therefore is potentially beneficial in liver detoxification and in neutralizing toxins.* It has been shown to support healthy copper and lead serum levels.* L-methionine is considered important for liver fat metabolism, healthy skin and nails, and energy production.* High purity, well tolerated, hypoallergenic.