天气预报 > 其他 > 牛奶煮久了会变质吗
牛奶煮久了会变质吗
更新时间: 2020-09-24 00:00:00  

这是因为牛奶含有丰富的氨基酸,在高温下,牛奶中的氨基酸与糖形成果糖基氨基酸,这种物质不但不被人体消化吸收,反而会影响人体健康,奶中胶体状的蛋白微粒在六十摄氏度时会脱水成凝胶状。牛奶中磷酸物在此温度下由酸性转为中性而沉淀。这是因为随着温度的升高,牛奶中所含的维生素、蛋白质等营养成分都会发生化学变化。而且营养会有所损失,煮的时间越长,损失越多。

关键词: 牛奶 变质

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