Methionine is an essential amino acid in humans and dogs. As the precursor of other amino acids such as cysteine and taurine, versatile compounds such as SAM-e (a compound that’s made naturally in the body and plays an important role in normal bodily function), and the important antioxidant glutathione, methionine plays a critical role in the metabolism and health of many species including humans and dogs.

Methionine is also an initiator of protein synthesis. It serves as a precursor to other amino acids like cysteine which can then be converted into taurine.

Methionine can also be converted into glutathione, an important physiological antioxidant, It is an amino acid that is vitally important to the long-term health of your dog.