Amino Acids - Lysine - Source

Ideal sources of lysine include amaranth, cheese, chicken, eggs, fish, lima beans, milk, red meat, potatoes, soy, yeast, and all protein-rich foods. High concentrations of lysine are found in chicken, at 89mg per gram of protein. Skim milk ranks second, at 77.5 mg/g and cooked soy beans and carrots are tied for third at 69 mg/g.

Lysine is also found as part of a multi-amino acid complex and protein powder supplements. It is also available as an individual supplement, mostly to treat cold sores and herpes simplex infection. Depending on the country in which you live, lysine may also be available as an isolated supplement in capsule or tablet form. You may require a prescription.