There are some foods that you should never reheat, because when subjected to high temperatures not only lose their benefits, but also they would be toxic.
Therefore, to prevent the reheating process from harming ones health, it is better not to reuse foods such as chicken, beets, potatoes, mushrooms, spinach, eggs and celery in salads and cold dishes.
The heating causes the compounds of the mentioned meals to change, a fact that could make the food toxic or turn it into a composition that causes diseases such as cancer.
Almost every day we reheat food to avoid wasting cooked food. But we must do it well to avoid risks, especially in sensitive people such as children, pregnant women or the elderly.