不能常吃隔夜的菜汤一顿饭吃完，剩点菜汤是常事。有许多人认为菜汤里营养丰富，有油也有味，倒掉可惜，便留在第二天吃，殊不知经常这样做对身体有危害。青菜中含有较多的硝酸盐类，煮熟后如放置过久，在细菌的分解作用下，硝酸盐会还原成亚硝酸盐。人喝了这种菜汤，其中... Can not eat overnight soup After a meal, leftovers soup is commonplace. Many people think that the soup is rich in nutrition and rich in oil and oil. It is a pity that we can afford to eat the next day without knowing that we often do harm to our health. Vegetables contain more nitrate, such as placed too long after the boil, in the decomposition of bacteria, nitrate will be reduced to nitrite. People drank this dish, where ...