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食物营养成分是营养工作不可缺少的基本要素，是了解人群的营养状况，评价膳食的营养质量、设计和实施营养改造计划必不可少的依据。不仅卫生预防保健工作所必需，也为广大人民群众合理选择食物提供指南。青海地处青藏高原、平均海拔3000m以上，具有缺氧、寒冷、干燥和紫外线照
Food nutrition is an indispensable element of nutrition work, is to understand the nutritional status of the population, assess the nutritional quality of the diet, the design and implementation of nutrition reform plan is an indispensable basis. Not only is it necessary for health prevention and health care work, but it also provides guidance to the general public on the rational choice of food. Qinghai is located in the Qinghai-Tibet Plateau, an average elevation of 3000m above, with hypoxia, cold, dry and UV photos