Bank M R, Kirksey A, West K, Giacoia G
Am J Clin Nutr. 1985 Feb;41(2):235-42. doi: 10.1093/ajcn/41.2.235.
A survey of infant feeding practices indicated that 40% of the mothers who breast-fed their infants frequently expressed and stored their milk in the home refrigerator/freezer prior to feeding. Effects of different lengths of storage time on the levels of folacin and vitamin C in both term (T) and preterm (PT) human milk were examined. Folacin and vitamin C intakes of most mothers were such that the levels of these vitamins in milk appeared to have reached saturation. Folacin levels in T and PT milk were similar but were lower in both after three months of freezer storage compared to one week of storage. Vitamin C content in PT milk was significantly higher than that in T milk and did not change after three months of freezer storage, whereas the vitamin C level in T milk decreased significantly. After 24 hr refrigeration of T milk, vitamin C content was lower but the folacin level was similar to that observed prior to refrigeration. The findings indicated that T or PT human milk, stored for 3 months in the freezer, would provide the recommended allowance of vitamin C but not of folacin for infants.
一项关于婴儿喂养方式的调查表明，40%经常母乳喂养婴儿的母亲在喂奶前会在家用冰箱/冰柜中挤出并储存母乳。研究了不同储存时间对足月儿（T）和早产儿（PT）母乳中叶酸和维生素C水平的影响。大多数母亲的叶酸和维生素C摄入量使得这些维生素在母乳中的水平似乎已达到饱和。T母乳和PT母乳中的叶酸水平相似，但与储存一周相比，冷冻储存三个月后两者的叶酸水平均降低。PT母乳中的维生素C含量显著高于T母乳，冷冻储存三个月后没有变化，而T母乳中的维生素C水平显著下降。T母乳冷藏24小时后，维生素C含量降低，但叶酸水平与冷藏前相似。研究结果表明，冷冻储存3个月的T母乳或PT母乳可为婴儿提供推荐剂量的维生素C，但不能提供叶酸。
