13 Foods to Never Reheat In a Microwave

The microwave is a really convenient, easy to use and a super quick way to heat up your leftover foods. While food is never quite good as coming out of a microwave as when it is fresh, we cannot deny that it is a good way to get warm food with minimal effort.

But, there are some foods that should never be microwaved. Sometimes, it ruins the food completely. Other times, it is because of a safety hazard. Whatever the case may be, there are some foods that you should never reheat in a microwave.

Here Are 13 Foods to Never Reheat In a Microwave

Rice

Microwaving rice the wrong way can lead to something called fried rice syndrome, which is type of food poisoning that is caused by the Bacillus cereus bacteria. These types of bacteria can live on even being cooked and when the rice is left out at room temperature, the only thing this bacteria can do is flourish.

  • It not that microwaving rice is bad – it’s that doing so the wrong way is just plain bad for your gut.
  • Rice should only be left out to cool for less than an hour before being put straight into the fridge.
  • Then, when reheated, the rice has to be reheated completely through.

Hot Chili Peppers

Chili peppers contain a component known as capsaicin and this is essentially what makes them so hot and spicy. When you put these peppers in the microwave, the extremely high temperatures cause those compounds to vaporize. Luckily, this will not cause them to explode.

But as you can imagine, this means that the steam that these peppers give off is going to be pretty intense. It can burn your throat and eyes due to how hot it is; this is so serious that people have had to evacuate buildings due to microwaved peppers! They may not explode, but what really happens isn’t much better.

Broccoli

Yes, this vegetable is very easy to heat up in the microwave. But it is a waste to nuke broccoli, as it causes a whopping 97 percent of all its nutritional content to vanish.

On top of that, cooking broccoli normally already removes a lot of its natural positive benefits. Steamed broccoli has 11 percent of its antioxidants completely stripped off, so you can only imagine what microwaving does.

Potatoes

The good news is that it’s okay to put uncooked potatoes in a microwave, no problem. But if that’s the case, why is it on this list? Well, reheating potatoes that have already been cooked is the true problem.

Potatoes contain C. botulinum, which is a kind of bacteria that grows on potatoes and can cause severe health issues. When cooked in aluminum foil, the bacteria is protected within the foil, so you have to eat it as soon as possible.

  • This means eating leftover potatoes is generally not a great idea.
  • If you really must, put them back in the oven without foil; this can heat and kill the bacteria.
  • Putting them in a microwave is a sure way to find yourself with a contaminated potato that may just make you very, very sick.

Chicken

Popping chicken in the microwave is unquestionably bad for you. Why? First, understand that microwaves aren’t particularly known for killing off bad bacteria reliably. Now, chicken is a food that is very, very prone to bacteria growth, especially salmonella.

You still probably don’t want to microwave it either, which is a real pity since it’s such a common leftover. But doing so can alter the composition of the protein in the chicken, causing you to have digestive problems to deal with after.

Raw chicken needs to be thoroughly cooked in order to kill the bacteria within them. Studies have found that those who cook chicken in a skillet are entirely fine, while those who use a microwave to cook their chicken can wind up with some form of illness. This is due to that the salmonella bacteria survives through the heating process.

Mushrooms

If you’ve already cooked mushrooms and there are leftovers, it may be better to throw them out right away or commit to reheating them absolutely properly. This is because mushrooms, like other types of fungi, are extremely vulnerable to bad bacteria and other microorganisms.

  • It is very difficult to store and then reheat mushrooms in the exact right way.
  • Try to prepare only the amount of mushrooms you want instead of overcooking.
  • In most cases, any kind of reheated mushroom – not just ones tossed in the microwave – are likely to give you a tummy ache.
  • You can also put the mushrooms straight into the fridge after cooking them and enjoy them cold if desired.

Eggs

Whole eggs with shells on them should never be boiled in the microwave. The extreme temperatures reached during the microwaving process can lead to a lot of internal pressure. This goes for microwaving already hard-boiled eggs, too. Basically, eggs have a history of exploding in a rush of painfully hot steam and causing burns.

However, even unshelled eggs are not safe from this, as the inside of the egg can still get a buildup of steam. What this means is that when you cut open the egg, extremely hot steam can rush to your hands or face.

Fruit

More accurately, we are referring to frozen fruit. Some people think that placing frozen fruit in a microwave will quickly thaw them out. Actually, doing so opens up the fruit to receive carcinogens, effectively removing a lot of the positive properties and health benefits of the fruits.

Even more so, it can lead to illness and cause your immune system to go down when you eat those forcefully defrosted fruits later. Your best bet is to simply defrost frozen fruit in your fridge a few hours before they’re needed, or even overnight.

Red Sauces

Red pasta sauce can still taste delicious after being nuked in the microwave. However, no matter how short of a time you’re trying to microwave a vat of red pasta sauce, it is going to explode and ruin the inside of your microwave.

Even if there aren’t tomato chunks in our pasta sauce, it’s likely still going to be too thick to have the steam escape from within easily. It’s best to put a saucepan on the stove and stir the sauce on low heat until it is warm instead.

The tomato chunks in red pasta sauces can block steam from escaping the sauce properly. Then, all of a sudden, the sauce explodes outwards due to built-up pressure and you’ll be left to clean up the horrible mess that comes out of it.

Processed Meat

All processed meats are generally unhealthy thanks to all the preservatives they are stuffed with that help them extend their shelf life. When you microwave those meats, though, the bad chemicals within the processed and refined foods begin to change in composition, making them even worse for you.

The resulting microwaved processed meats may contain oxidized cholesterol thanks to the radiation from the microwave. This can cause an increased risk of heart disease. It goes without saying that processed meats have all sorts of bad effects, anywhere from causing weight gain to resulting in decreased positive thinking, and even lessening your energy levels.

Bread

Putting bread in the microwave for a kind of warm toast is not the best idea. It isn’t going to cause any health or safety hazards. We wouldn’t recommend trying to reheat bread in the microwave.

  • The gluten within it, as well as the sugar and starch, gets a little weird when it is microwaved.
  • Then, when the bread cools off so you can eat it without yelping at the heat, a reaction occurs that leads to bread to go very hard and chewy.

Instead, use foil to wrap your bread and put it in the oven. Although it takes just a touch longer, it will also taste and feel much better.

Leafy Greens

Leafy green foods such as spinach, celery, kale, and more often find their way into our leftovers. But electrical engineering professor Mark Golkowski explains that some vegetables have different properties that can actually cause microwaves to spark. This will not only burn your veggies, but it may also break your appliance.

In addition, some studies have found that many leafy greens contain nitrates that, when exposed to a microwave’s heating process, can turn into nitrosamines. These nitrosamines are actually worryingly carcinogenic, removing all positive qualities of your greens and making them dangerous.

Food That Has Already Been Reheated

Taking some leftovers out of your fridge and heating them up in any way is something you can only do once. The more times you have cooled, heated, cooled, heated, and cooled and heated food again, the greater the chances that bacteria has grown on the food and become dangerous to eat.

  • This means you should portion your leftovers. Take only what you need and reheat just that, and leave the rest in the fridge for later.
  • It doesn’t matter if you reheat on the stove first and want to reheat in the microwave next; it’s all bad when you’re reheating too many times.

Final Thoughts on Some Foods to Never Reheat In a Microwave

There are a number of reasons that the microwave isn’t the best option to reheat food. With that being said, we totally understand the appeal. Still, it maybe isn’t the best idea to microwave these particular foods unless you want to deal with negative aftermath ranging from digestive issues to illness, and from explosions to messes.

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