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Introduction: A vegan diet can meet nutritional requirements if it is well planned. In this sense, vegans should be advised to choose alternatives to animal products and to select the appropriate respective serving size of them. The nutritional value of traditional plant foods portions is well known, however, the vegetarian market offers other products whose chemical composition is less known, as they are not widely consumed by the population. It is necessary to know both, the nutrient content of portions of these foods, and bioavailability of these nutrients in plant food diets. Objectives: This work aims to refine the available information about the nutritional contribution to the diet of a healthy adult of the main common vegan foods portions. In addition, some points about bioavailability of the most relevant nutrients are discussed, and alternatives proposed to improve nutrient utilization. Methods: Composition data of common vegan foods per 100 g were searched from food composition database, and serving size nutrient composition was calculated. Nutritional data were compared to European dietary reference values for nutrient intakes for adult population, and bioavailability of the most important nutrients was discussed. [ABSTRACT FROM AUTHOR]