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[饮食养生] 脱脂奶粉不表示脂肪含量为0

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发表于 2019-2-10 07:38:31 | 只看该作者 回帖奖励 |倒序浏览 |阅读模式
(华南农业大学食品学院 赵力超 许文娟)脱脂奶粉就是没有脂肪?并不是,而且也?#28909;?#33026;奶粉少了不少营养素。

脱脂奶粉是在全脂奶粉生产工艺基础上增加脱脂工艺,用离心方法将脂肪全部去除的?#35759;群?#25104;本比较高,一般来说,终产品中脂肪含量在1%左右就可以了,有的要求不高于2%。而全脂奶粉的脂肪含量大约是26%以上,相?#36828;?#35328;,脱脂奶粉脂肪含量很低了,不过这并不表示脂肪含量为0。

那么,脂肪含量少了对奶粉的营养有什么影响吗?脂肪能给人体供给能量,也可为机体提供必需脂肪酸和溶解于其中的脂溶性维生素。脂肪脱去了,其他成分比例相应增高,但脂溶?#26434;?#20859;素也没有了。

通过?#21592;?#21487;?#33489;?#29616;,脱脂奶粉的蛋白质、碳水化合物?#28909;?#33026;奶粉高l/3左右,钙、磷、部分维生素的含量也?#28909;?#33026;奶粉高,但全脂奶粉?#22902;?#21547;量比脱脂奶粉高出3倍。而?#23452;?#30528;脂肪被分离出去,奶粉中的维生素A、E、D、K等脂溶?#26434;?#20859;物质也流失了,?#26434;?#25226;奶粉当主?#36710;?#23156;幼儿来说,长期食用脱脂奶粉则易导致脂溶性维生素摄入不足。

所以,从营养的角度上来考虑的话,全脂奶粉营养成分更全面,也适宜更多的人群。而全脂奶粉脂肪多,发热量比脱脂奶粉高1/3左右,需要控制体重的人士还是可以考虑脱脂奶粉的,缺失的脂溶性维生素可以通过其他途径补充。

同样的,脱脂奶粉适合消化不良的婴儿以?#26696;?#27899;、胆囊?#19981;肌?#39640;脂症、慢性胰腺炎等患者,他们都是不宜摄入过多脂肪而?#20013;?#35201;补充营养的人群。

另外,脂肪的去除还会影响奶粉的口感和味道,牛奶中的风味物质(奶香味)是蛋白质、脂肪、乳糖这三大类物质的?#21040;?#20135;物,或每一类物质的衍生物之间相互反应生成。因此,脱脂奶粉的味道没?#24515;?#20040;香,也就可?#23731;?#35299;了。

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