人乳、牛乳及婴儿奶方中脂肪酸组成比较

进一步提倡母乳喂养.方法 采用气相色谱法测定了人乳、牛乳和婴儿奶方中脂肪酸的含量.结果 显示婴儿奶方和半乳中总饱和脂肪酸(sfA)、C8:0、C14:0C16:0 、和C18:0含量都显著高于人乳,而总不饱和脂肪酸(TUFA)、总多价不饱和脂肪酸(PUFA)、亚油酸(C18:2,LA),α-亚麻酸(C18:3,LNA)和花生四烯酸(C20:4,AA)含量都显著低于人乳.人乳中可测得二十二碳六烯酸(C22:6DHA),而在婴儿奶方和年乳中都未测得DHA .结论 婴儿奶方中脂肪酸组成较牛光更接近于人乳,但不能完全替代人乳.人乳是婴儿理想的食物选择.婴儿奶方中应强化DHA.

Comparison of Fatty Acid Composition of Human Milk, Cow Milk and Ineant Formulas

In order to further advocate breast feeding. Methods we analysed the fatty acld composition of human milk, cow milk and infant formulas by gas chromatog-raphy. Results The contents of total saturated fatty acids(SFA),C8 : 0,C14 : 0,C16 : 0, and C18: 0 in infant formulas and cow milk were significantly higher than that in human milk, while the contents of total unstaurated fatty acids (TUFA), polyunsatu-rated fatty acids (PUFA), linoleic acid (C18: 2, LA) ,linolenic acid(C18: 3, LNA) and arachidonic acid (C20 : 4, AA) in infant formulas and cow milk were significantly lower than that in human milk, DHA can be detected in human milk, but it is not detectable both in infant formulas and in cow milk. Conclusions Compared with cow milk, the fatty acid composition of infant formulas was more close to that of human milk, but infant formulas can not completely substituted for human milk. Human milk is an ideal nutritional source for infants. Docosahexaenoic acid should be fortified into the infant formulas.