Abstract
Purpose of Review Health organizations throughout the world advocate diets that emphasize vegetables, fruits, pulses, grains, and minimally processed staple foods as beneficial throughout life and in old age. However, concern exists that the dietary exclusion or minimalization of flesh foods may compromise the nutritional status of some nutrients, including vitamin B12, iron, and zinc. The purpose of this study is to discuss the metabolism and dietary sources of vitamin B12, iron, and zinc and review observational studies that investigate the status of these micronutrients in older vegetarians compared to their non-vegetarian counterparts.
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