我国主要食物中泛酸含量及其对居民膳食摄入量的贡献

PANTOTHENIC ACID CONTENT IN CHINESE COMMON FOODS WITH ITS CONTRIBUTION TO DIETARY INTAKE

目的开展我国主要食物中泛酸含量的测定,为了解我国居民膳食泛酸摄入量提供支持。方法2017-2019年夏秋季节在北京、海南、西藏、新疆等地采集食物样品共计109种,经适当酶解后采用微生物法测定总泛酸含量。数据整理归类后,结合2015-2017年中国居民膳食消费量调查资料,计算得到了泛酸平均摄入量,并对各类食物的贡献率做出初步评估。结果所有样品均含有泛酸并可被检出,其中动物肝脏、鸡蛋、豆类、菌藻、酵母等含量水平>1 mg/100 g。3~、6~、12~、18~或>60岁人群泛酸平均摄入量分别为3.2、4.3、5.1、4.7、4.4 mg/d,另外0.5~1岁婴儿摄入量为1.0 mg/d,谷物对成人泛酸摄入量的贡献率最大(48.8%)。结论本研究首次发布了我国居民常消费食物的泛酸含量,对不同年龄段居民泛酸摄入量进行了初步评估,证明谷物是泛酸的主要来源。

Objective Pantothenic acid content in Chinese common foods was determined,to support dietary intake evaluation.Methods A total of 109 food samples were collected from Beijing,Hainan,Tibet,Xinjiang and other places during the summer and autumn seasons of 2017-2019.After appropriate enzymatic hydrolysis,total pantothenic acid was determined by microbial method.Then average dietary intake of pantothenic acid was calculated,by combining classified foods data with Chinese residents'dietary consumption survey data in 2015-2017,and the contribution of various foods to pantothenic acid intake was preliminarily assessed.Results Pantothenic acid was detectable in all food samples.Its content in animal liver,eggs,legumes,bacteria,algae,or yeast,etc.was over 1 mg/100 g.The average intake of pantothenic acid in individuals aged 3-,6-,12-,18-,and>60 y was 3.2,4.3,5.1,4.7,4.4 mg/d,respectively.In addition,the everage intake in infants aged 0.5-1 was 1.0 mg/d.Cereals were the main contribution to adult dietary intake(48.8%).Conclusion This is the first release of pantothenic acid content in foods from China.The dietary intake of pantothenic acid by different age populations was calculated,in which cereals contributed the most.