[6] The following table lists the optimal profile of the nine essential amino acids in the human diet, which comprises complete protein, as recommended by the US Institute of Medicine's Food and Nutrition Board.
Recommended Daily Intake is based on 2,000 kilocalories (8,400 kJ) per day,[12] which could be appropriate for a 70 kg (150 lb) adult.
In a plant-based diet there is the perceived issue of amino acid content of various individual foods.
In addition to grains, such as corn, rice, or wheat, vegetable protein also occurs in legumes, which include beans and peanuts.
Grains tend to be deficient in tryptophan and lysine, whereas legumes lack methionine Thus a meal combining grains and legumes such as the Mexican peasant dish of corn tortillas and refried beans is basically complete in amino acid content.