The New Year is a time for eating and drinking, usually the old dishes are not yet finished and add new dishes, although a large table full, but really can be a meal to finish the family is very little, inevitably will leave some leftovers. But some experts point out that leftovers can cause cancer if you eat too much of them. Leftovers can really cause cancer? We have always advocated “eat how much, do how much”, try not to leave the food, mainly because leftovers have three major health risks. One of them is the loss of nutrition. For example, the vitamin C in vegetables is afraid of heat, the first fry has lost 30%-40%, if the heat again, the vitamin C content will be even less. The same is true for vitamin E, folic acid, etc. Second, it is easy to breed bacteria. Meat and soy products, such as high protein content, deep “favor” of microorganisms. Third, leftovers may produce carcinogens. We often say that nitrite is a carcinogen. Nitrite itself is toxic, in the stomach and protein encounter, will produce carcinogenic substances nitrosamines. Under normal conditions, nitrite in the diet is not harmful to the human body, but if consumed in excess, nitrite will generate excessive nitrosamines in the acidic environment of the stomach, which may induce cancer. The level of nitrite increases when cooked vegetables are left at a higher temperature for a period of time. Bacteria can also be eliminated by high temperatures, if the food produces nitrites, it can not even be eliminated by reheating. Keep away from diseases Don’t eat these foods 1, sweet drinks Substance: flavoring, coloring, sugar and water plus a whole lot of food additives, no matter how good its advertising claims. Hazards: obesity, tooth decay, calcium deficiency, childhood leukemia, etc. Admonition: Never take sweet drinks as water for children again. 2, the supermarket of green snacks Substance: flour, sugar, fat and a long list of food additives, especially those heavy, can not see the raw materials of food Hazard: obesity, heavy, refuse to eat, which trans fatty acids will also threaten the nervous system of children and affect physical development. Admonition: on the supermarket in addition to milk, fruit, good quality dried nuts and fruits, other than the choice of children’s snacks. 3, street stalls Substance: operating without a license, poor hygiene, quality of goods without assurance, fried and baked in a bad way of production. Hazards: the lighter diarrhea, the more serious death. 4, foreign fast food Substance: high fat, high protein, high energy, low nutrition Hazards: obesity, prone to liver cancer