what is l- lysine
Lysine. Lysine is an essential amino acid that is found in foods such as yogurt, cheese, meats and beans. It is available as a dietary supplement that is used to treat some metabolic disorders.Learn more about lysine from our experts.ysine. Lysine is an essential amino acid that is found in foods such as yogurt, cheese, meats and beans. It is available as a dietary supplement that is used to treat some metabolic disorders.