After the leftovers are repeatedly heated or brewed with boiling water, the water-soluble vitamins such as B vitamins almost disappear, and most minerals are also lost, so malnutrition is easy to occur after long-term consumption. The content of nitrite in leftovers will gradually increase with the prolonged storage time. After long-term consumption, it is easy to cause nitrite poisoning, and there are symptoms such as abdominal pain, diarrhea, dizziness and headache.
improper preservation of leftovers is extremely easy to breed bacteria, and long-term consumption will lead to a large number of bacteria entering the gastrointestinal tract, increasing the risk of gastrointestinal diseases. It is not recommended to eat leftovers for a long time, but to cook as needed. In addition, when eating leftovers, you must fully heat them.