A growing number of Americans are choosing to follow vegetarian diets. These diets can meet the nutritional needs of individuals of all ages. Vegetarians who eat eggs and/or milk and dairy products have no special problems in obtaining adequate nutrients. Pure vegetarians, who avoid all animal products, should pay particular attention to sources of protein, calcium, and riboflavin. Supplementation of vitamin B12 is indicated in these individuals. Guidelines for both good normal nutrition and therapeutic diets can be adapted for use with a vegetarian diet.
越来越多的美国人选择遵循素食饮食。这些饮食能够满足所有年龄段人群的营养需求。食用蛋类和/或牛奶及奶制品的素食者在获取充足营养方面没有特殊问题。纯素食者，即避免食用所有动物产品的人，应特别注意蛋白质、钙和核黄素的来源。这些人需要补充维生素B12。良好的正常营养指南和治疗性饮食指南均可适用于素食饮食。
