2. Chicken
If you reheat chicken after a day or two and eat it, it can become very toxic for your health. This is because all the protein composition changes when a cold chicken is heated for the second time after being kept in the fridge for a certain time. This will cause digestive problems and acidity issues that would not make your feel comfortable. For this reason, it is better to eat your chicken cold or perhaps heat it carefully under low temperature and adding some healthy ingredients with it.