Can leftovers really cause cancer?

  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, will inevitably leave some leftovers. But some experts point out that leftovers can cause cancer if you eat too much leftover food.  
  A. Leftovers can really cause cancer?
  We have always advocated “how much to eat, how much to do”, try not to leave the food, mainly because there are three major health risks of leftovers.
  One, is the loss of nutrition. For example, the vitamin C in vegetables is afraid of heat, the first frying has lost 30-40%, if the heat again, the content of vitamin C 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 microbial “favorite”.
  Third, leftovers may produce carcinogens. We often say that nitrite is a carcinogen. Nitrite itself is toxic, in the stomach with protein, 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 destroyed by high temperature, if the food produces nitrite, it can’t even be eliminated by reheating.  
 
  Second, away from disease Do not 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 in the flowery green snacks
  Substance: Flour, sugar, fat and a long list of food additives, especially those heavy, can not see the raw materials of food
  Hazards: obesity, heavy, refuse to eat, which trans fatty acids will also threaten the nervous system of children and affect physical development.
  Admonition: go to 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, no guarantee of the quality of goods, 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