我国市售学生乳粉营养素含量分析

Nutrient Analysis of Milk Powder for Schoolchildren Sold in Chinese Markets

分析市售不同品牌学生乳粉的营养强化情况和能量及营养素含量分布。根据包装标示的营养成分表和食用方法计算出各产品每日可提供能量和营养素的量,与中国居民膳食营养素参考摄入量中学龄儿童人群的推荐量进行比较。结果表明:不同品牌学生乳粉VC、VE、VB_(6)、叶酸、二十二碳六烯酸、膳食纤维和亚油酸含量差异较大,VA、VD、VC、牛磺酸和矿物质钙、铁、锌的强化比例超过2/3;以学生乳粉产品营养素含量的中位数计算,以7~10岁男性学龄儿童为例,学生乳粉提供了需要量约12%的能量,约30%的蛋白质、VC、VD和铁,约40%的VB6、钙和锌以及近50%的VA和VB2。学生乳粉作为一种方便、易获得的乳制品,总体上有其营养优势。

This study aimed to analyze the nutritional fortification and the distribution of energy and nutrient contents of different brands of milk powder for schoolchildren sold in Chinese markets.The daily supply of energy and nutrients from each product was calculated according to the nutritional information and recommendations for consumption on the package,and compared with the amounts recommended by the Chinese dietary reference intakes(DRIs)for schoolchildren.The results showed that the contents of vitamin C,vitamin E,vitamin B6,folic acid,docosahexaenoic acid(DHA),dietary fiber and linoleic acid varied greatly among different brands of milk powder for schoolchildren.Vitamins A,D,C,taurine and the minerals calcium,iron and zinc were fortified in more than two-thirds of the investigated samples.Based on their median nutrient contents,the milk powders provided about 12%of the energy requirements of male schoolchildren at 7–10 of age,including about 30%of the protein,vitamin C,vitamin D and iron,about 40%of the vitamin B6,calcium and zinc,and nearly 50%of the vitamin A and vitamin B2.Overall,milk powder for schoolchildren,a convenient and easily available dairy product,has nutritional advantages.