If you ask people how to store the leftover food? Most people’s answer must be “put in the refrigerator”; recently, the Internet about some food in the refrigerator will actually become “poison” topic has attracted the attention of many netizens. Many people say that tomatoes, bananas and leftovers can not be put into the refrigerator, will be harmful to the body. So, is this really the case? The following will reveal the truth for everyone. Viewpoint 1: “Naked leftovers” directly into the refrigerator easily lead to nitrite exceed the standard, easy to cause cancer. First of all, nitrite causes cancer, this problem does exist, but not eat leftovers will certainly cause cancer. Experiments have shown that if a plate of newly prepared dishes is put in the refrigerator without turning, the content of nitrite only rises from 3 mg/kg to 7 mg/kg the next day, which is far below the national standard for nitrite carcinogenicity. For leftover food, nitrite is not as terrible as some articles say, and does not produce those sensational hazards. The content of nitrite varies with the type of leftover food, for example, vegetables > meat; for food, the nitrites generated by normal and reliable preservation will not have much effect on the body. Secondly, as for “cancer”, it is caused by a combination of factors, and it is not certain that one or two times of eating leftover food will cause cancer. “Therefore, it is not possible to generalize the causes. Although leftover food is not a big problem, it should be stored reasonably 1. First of all, vegetables are a class of nutrient-rich food, especially vitamin C and plant pigment substances, and these nutrients after a long period of time and environmental (temperature) changes loss, so it is not suitable for storage; secondly, vegetables in the process of storage more or less will produce the so-called carcinogenic to the body “nitrite-like substances “, which is not conducive to the health of the body. Compared to dishes, meat ingredients after reasonable storage of protein is not much change, other nutrients content is less, so it will be safer; that is, “left meat not left vegetarian”. 2, prepare professional food preservation box, reasonable preservation of leftover food. In contrast, it is recommended that you can buy some professional food preservation boxes, in contrast to this can be better to preserve food, to avoid food contaminants. 3, leftovers need to be heated through, not leaving hidden dangers. For leftover rice scraps, it is recommended that we must fully heat (heat through) when eating the next day to avoid harmful substances; and it is recommended that you can add some additional fresh vegetables, such as tomatoes, onions, greens, etc. when you heat up the rice; both supplement the nutrition and add flavor. Viewpoint two: “tomatoes put into the refrigerator will be frozen, harmful to the body” Many articles claim that tomatoes put into the refrigerator is easy to be frozen discoloration, freezing bad, eaten after harmful to the body. In fact, the refrigerator at home, the refrigerator storage temperature is generally around 3-5 ℃, in this temperature tomatoes will not be frozen at all discolored, not to mention “frozen bad”. For tomatoes, it is mainly not recommended to put them in the refrigerator, not “not” in the refrigerator. The main reason is that tomatoes are a kind of vegetables and fruits that are picked in the “raw state”, after picking, the tomatoes themselves are still gradually mature, the more mature tomatoes will be relatively better taste, and these are attributed to the production of flavor sugars and acidic substances, low temperature will affect the production of flavor substances in tomatoes, so it is not recommended to put Tomatoes are not recommended to be stored in the refrigerator. However, tomatoes in the refrigerator do not produce harmful substances, except for the change in flavor. As for the question of “will tomatoes deteriorate when kept at room temperature”, don’t worry, tomatoes have a layer of dense skin on the surface, which can resist the attack of bacteria, that is to say, tomatoes kept at room temperature for a long time will not be corrupted and become bad. The third point of view: bananas in the refrigerator black spot, can not eat bananas appear black spot, is one of the most common situation, in fact, with the banana deterioration does not have any relationship, also does not represent how much nutrition loss, it is only because the banana peel in the polyphenol compounds are oxidation caused by the peel to become black. Bananas, like tomatoes, are picked when they are “green” and then stored in a temperature and gas-controlled environment. They are then stored in a controlled environment with temperature and gas. They are not taken out and ripened with vinyl until they are ready to be sold in the market. In fact, bananas produce ethylene during the ripening process, and in this process, the starch in bananas is transformed into sugar, which is why they “get sweeter and sweeter”, while the softer bananas get, mainly due to the decomposition of pectin in the process. For the preservation of bananas, fundamentally it is not recommended to refrigerate, but refrigeration is not harmful to the body, for bananas as the representative of the fruit, it is recommended to eat now and buy, if left, it is best to store at room temperature, buy too much can also be frozen preservation (after peeling). Refrigerator storage food, these points need to pay attention to 1, raw and cooked separately, reasonable storage. Refrigerator storage food, it is recommended that raw and cooked separately, one is to avoid microbial cross-contamination, health risks; two is to prevent food between the string taste. 2, the refrigerator location is different, the temperature is different, need to be stored scientifically. For the refrigerator, area is different, the temperature is also different, generally for the refrigerated area, the refrigerator below than above cold some; against the inside of the deep place than against the door side of the place cold some, so in accordance with the food analogy differentiate treatment.