Hello! No matter what kind of cooking and vegetables are mixed together, nitrite in vegetables will rise overnight if salt is added, whether it is stored at room temperature or refrigerated in refrigerator. Nitrite is a substance harmful to health. If the human body regularly ingests nitrite, there will be a risk of cancer. Therefore, try not to eat overnight dishes. Although the content of nitrite can be reduced by freezing food in the refrigerator, food still contains nitrite after all.

If you have to eat these leftovers, you can keep them in a sealed box or vacuum box at low temperature, which can reduce the rise of nitrite. But it is very troublesome to do so. So ... for your health, don't eat overnight meals. If the body has poor resistance or low immunity, poisoning can seriously cause vomiting, diarrhea, acute enteritis and other diseases.