There's nothing risky about microwave radiation – but there are health concerns about heating up plastic. Here’s what the latest research says about how to safely microwave your food.
There's nothing risky about microwave radiation – but there are health concerns about heating up plastic. Here's what the latest research says about how to safely microwave your food.
Lead researcher Xianli Wu, a scientist at the Beltsville Human Nutrition Research Center at the US Department of Agriculture, says there isn't one agreed mechanism to explain why microwaving could increase flavonoid content.
"Some plastic isn't designed for microwaves because it has polymers inside to make it soft and flexible, which melt at a lower temperature and may leach out during the microwave process if it goes beyond 100C ," says Juming Tang, professor of food engineering at Washington State University.
It's important to remember that, when heating food in a plastic container, exposure also can happen with plastic that doesn't touch the food, such as a lid. "Temperatures will be different in a cross-section of the food. It's hard to achieve a completely uniform temperature, especially when talking about raw foods."
When Betty Schwartz, professor of nutritional sciences at the Hebrew University of Jerusalem, saw her students heating jacket potatoes in the microwave on their lunchbreaks, she noticed small crystals inside their potatoes.
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