怎么煮饭可以避免维生素被破坏?
发布日期:2017-08-03 18:12:40

 蒸饭煮饭都是淘米后放冷水再烧开,这已是司空见惯的事了,但事实上,正确的做法应该是先将水烧开,用开水来煮饭。那么,这样做的好处是什么呢?
  1  开水煮饭可以缩短蒸煮时间,保护米中的维生素。由于淀粉颗粒不溶于冷水,只有水温在60℃以上,淀粉才会吸收水分膨胀、破裂,变成糊状。大米含有大量淀粉,用开水煮饭时,温度约为100℃(水的沸点),这样的温度能使米饭快速熟透,缩短煮饭时间,防止米中的维生素因长时间高温加热而受到破坏。
  2  将水烧开可使其中的氯气挥发,避免破坏维生素B1。维生素B1是大米中最重要的营养成分,其主要功能是调节体内糖类的代谢,如果缺乏它,神经系统会受到影响,容易产生疲劳、食欲不振、四肢乏力、肌肉酸痛、脚气病、浮肿、心律紊乱、顽固性失眠等症状。而我们平时所用的自来水都是经过加氯消毒的,若直接用这种水来煮饭,水中的氯会大量破坏米中的维生素B1。用烧开的水煮饭,氯已多随水蒸气挥发了,就大大减少了维生素B1及其他B族维生素的损失。

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