\n\n
虽然补钙不如牛奶,但豆浆有些植物营养成分是特有的,比如大豆异黄酮、大豆皂甙、大豆卵磷脂、大豆低聚糖、其他多酚类物质等[2]。
\n\n要知道,这些成分对于提高免疫力,保护心血管等都有帮助。这部分植物化学物质,也是豆浆营养的精华所在[2][3][4][5]。
\n\n以最常见的大豆异黄酮来说,作为一种植物雌激素,它能够改善更年期不适和骨质疏松,还有助于降低胆固醇[5]。
\n\n公平的说,豆浆和牛奶都是低脂肪、低热量的食物,每 100 克食物中,豆浆热量为 31 千卡,和芥菜相同;而牛奶的热量 65 千卡,和红元帅苹果差不多[1]。
\n\n不过相对来说,和牛奶相比,豆浆中脂肪、碳水化合物的含量都要低一些,饱和脂肪酸含量也更低,而且不含胆固醇,能量仅为牛奶的二分之一左右[1]。
\n\n而且,豆浆中还有牛奶中没有的膳食纤维,膳食纤维不仅让人有更强的饱腹感,还可以促进肠道蠕动,有利于控制胆固醇和血糖水平[6]。
\n\n\n\n从蛋白质含量上说,豆浆和牛奶差别不大。
\n\n从蛋白质质量上说,豆浆和牛奶中的蛋白质都是优质蛋白质,氨基酸种类齐全,而且消化吸收利用率高。
\n\n所以如果想补充蛋白质的话,选它俩谁都是合适的。
\n\n比了四轮,不难发现,豆浆和牛奶各有自己的优势,很难说谁更好,也不能相互取代。而且它俩相比隔壁的白粥,维生素和矿物质都更为丰富,是理想的早餐选择。
\n\n有传言说,牛奶和豆浆不能一起喝,因为豆浆中含有“胰蛋白酶抑制剂”,会抑制牛奶中蛋白质的吸收。
\n\n其实在豆浆加热过程中,其中的“胰蛋白酶抑制剂”90% 以上的已经被灭活,基本不会影响蛋白质的吸收[7]。
\n\n相反的,如果把牛奶和豆浆一起喝,反而有营养促进的效果。比如豆浆中含有维生素 K、钾、镁,可以促进牛奶中钙的吸收、利用与代谢;牛奶中的维生素 B2 和维生素 A,豆浆中的大豆异黄酮,三者都有助于皮肤健康。
\n\n当然,这里的“一起喝”并不是早餐一定要喝了豆浆再喝牛奶。如果早上喝豆浆,下午喝袋牛奶来加餐,或者今天豆浆,明天牛奶,都是不错的选择。
\n\n说了牛奶、豆浆千般好,总有一些人是天生无福消受的。比如乳糖不耐受的人,喝不了常规的牛奶,建议喝酸奶或是低乳糖产品。
\n\n再比如对豆浆中“抗营养因子”(如胰蛋白酶抑制剂、植酸等)等敏感,喝了会腹胀喝产气的人,可以先少喝,后面逐渐增加,让肠胃逐渐适应[8]。
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Journal of Food Science, 2003, 68(1): 401-404.","刘志胜, 李里特,辰巳英三.大豆异黄酮及其生理功能研究进展[J].食品工业科技, 2000, 1(21):78-80.","张娟, 闫瑞霞, 孙志洪.全豆豆浆与传统豆浆感官品质和营养成分对比. 大豆 科学[J]. 2017, 36(3):459-462.","杨晓晖. 豆浆的营养价值:豆浆粉和现磨豆浆对比[J]. 大豆科技. 2014(2) : 37-39.","徐奇友, 许红. 马建章大豆中营养因子和抗营养因子研究进展[J].中国油脂, 2006,31(11): 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