Lysine is an amino acid that is commonly and widely used in the biosynthetic production of proteins. It is made up of three chemical component groups: an a-amino acid group, an a-carboxylic acid group, and a side chain lysyl, which altogether classify lysine as a charged aliphatic amino acid. Due to its complex protein structure, lysine is essential to humans, which means that it cannot be naturally produced by the body and must therefore be obtained through dietary means in order for a person to stay healthy and continue to function. Good dietary sources of lysine are foods that are rich and high in protein, such as eggs and meat, specifically red meats, lamb, pork, and poultry. It can also be found in soy products, beans, certain cheeses like Parmesan cheese, and certain fishes like cod and sardines. It can also be found in most cereal grains and legumes, and is heavily found in traditional Middle Eastern and Mediterannean diets in foods like hummus and pita bread. For vegetarian dietary options, it can be naturally found or biosynthetically added to the rices, beans, and tortillas commonly found in traditional Mexican and Latin American diets.