Nowadays, family meals are usually leftovers, especially at night, we should know that overnight food can not be eaten, especially overnight eggs, tea, stems and leaves of vegetables, these foods overnight nitrite content is very high.

1, overnight eggs can not be eaten

Eggs if not fully cooked, uncooked yolks eaten after overnight, in the case of improper preservation, nutritious things easy to breed bacteria, harmful to health. However, if the eggs are already cooked, and properly sealed and stored at low temperatures (generally refrigerated temperatures), they can generally be stored for 48 hours without problems. Whether eggs can be eaten overnight depends not only on whether they are heated or not, but on whether the eggs are cooked when they are cooked for the first time, and only after they are cooked for the first time, there is no problem with cooking them overnight and eating them again. This is the same thing with tea eggs.

2, overnight boiled water can not drink

Tap water boiled 3 to 5 minutes, nitrite and chloride and other harmful substances in the lowest content, the most suitable for people to drink. Drink less overnight boiled water: nitrite in the body can form carcinogenic nitrosamines. Some experts have found that the nitrite content of boiled water is higher than raw water. And repeated times boiling time is too long or more than 24 hours of boiling water, nitrite content are significantly higher. Boiling water after 24 hours, nitrite content is just boiling 1.3 times.

3, overnight tea can not drink

Overnight tea because of the time is too long, most of the vitamins have been lost, and tea in the proteins, sugars, etc. will become bacteria, mold breeding nutrients, so people usually think that overnight tea can not be drunk.

4, overnight fungus can eat

Fungus soup is a high-level nutritional supplements, but a night, the nutrients will reduce and produce harmful components. Because both indoor cultivation of silver fungus and linden field cultivation of silver fungus contains more nitrates, after cooking, such as put in a long time, in the decomposition of bacteria, nitrates will be reduced to nitrite. People drink this soup, nitrite will naturally enter the blood circulation, blood in the red blood cells have hemoglobin, can carry a lot of oxygen for the body needs. But nitrite plays a counterproductive role, so that the human body in the normal oxidation of hemoglobin into high iron hemoglobin, the loss of the ability to carry oxygen, resulting in the lack of normal human hematopoietic function

5, overnight leafy vegetables do not eat

Because of the part of the leafy greens contain more nitrate class, cooked if placed for a long time in the decomposition of the bacterial action, the nitrate will be restored to the nitrite, which has carcinogenic effects. Nitrite, carcinogenic, heating can not be removed. Usually stem and leafy vegetables have the highest nitrate content, melon vegetables slightly lower, root and cauliflower class in the middle. Therefore, if you buy different kinds of vegetables at the same time, you should eat the stem and leafy first, such as cabbage, spinach and so on. If you are ready to make more dishes to eat the next day hot, you should do as little as possible

6, stem and leafy vegetables, while choosing melon vegetables.

Family marinade bad goods do not eat overnight. Many people also like to eat the rest of the marinade bad goods in the refrigerator "overnight", but this practice has a great food safety hazards. Prevention of food poisoning, spring and summer seasons to eat marinated bad goods do not overnight. Bulk flavor is to be eaten the same day, not overnight. From the food safety point of view, this is not hygienic, if possible, it is best not to eat overnight bad goods. Food experts remind, even in the refrigerator food, is not absolutely "insurance". The refrigerator is easy to breed mold, and cold bacteria.