Here are 12 foods you shouldn’t reheat in the microwave, along with the reasons why—they can lose nutrients, develop harmful compounds, or become unsafe/unpalatable:
1. Potatoes🥔
If potatoes are kept at room temperature after cooking, they can grow bacteria associated with botulism. Microwaving doesn’t always kill them.
2. Chicken🍗
Uneven heating in a microwave can leave cold spots where bacteria like salmonella can survive.
3. Rice🍚
Cooked rice can contain spores of the bacterium Bacillus cereus, which can survive cooking and multiply if not stored properly.
4. Eggs🥚
Reheating boiled or scrambled eggs can make them rubbery and cause harmful compounds to build up.
5. Spinach and leafy greens🥬
High in nitrates, which can convert to potentially harmful compounds when reheated, especially in extreme cases related to methemoglobinemia.
6. Mushrooms🍄
They spoil quickly and reheating can break down proteins, leading to digestive upset.
7. Seafood🐟
Microwaving can make seafood rubbery and may not kill bacteria evenly, increasing the risk of food poisoning.
8. Processed meats (such as sausages)🌭
Contain preservatives that can form harmful oxidation products when microwaved.
9. Breast milk
