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- 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. (en)
- There is an increased possibility of protein deficiency with a strictly vegetable diet, unless the vegetable sources are carefully combined so that they complement one another. (en)
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