NFH L-Lysine SAP 90 CapsulesLysine is classified as being an essential amino acid for human health. This means that lysine has to be consumed in adequate amount in the diet and cannot be synthesized from other amino acids in the body. Lysine is found in highest concentrations in animal protein sources such as meat and dairy. Lower amounts are found in proteins from grain products such as corn and wheat. Lysine is required by the body for many functions, including the synthesis