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When used correctly, there’s nothing to worry about in terms of a microwave’s radiation, according to the World Health Organization.
But other concerns are less clear: for example, whether microwaving food causes nutrient loss, or whether heating food in plastic can trigger hormone disruption.
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There’s no simple answer as to whether microwaving vegetables will retain more nutrients that any other method, because each food is different in terms of the texture and nutrients they contain.
Studies show that shorter cooking times tend to not compromise nutritional content. Steaming and microwaving could even increase content of most flavonoids, which are compounds linked to reduced risk of heart disease.
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Microwaves use low frequency electromagnetic radiation (same as in lightbulbs and radios).
When you put food inside a microwave, it absorbs these microwaves, which makes water molecules in the food vibrate, causing friction that heats up the food. Humans absorb electromagnetic waves, too. But microwave ovens produce relatively low frequency waves and they are contained inside the microwave.
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Food is most nutritious at the point of harvest. After that, fresh produce starts degrading.
Once picked, that fruit or veg is using its own nutrients to keep its cells alive. Vitamin C fou...
Refrigeration slows down the process of nutrition degradation. The nutritional loss varies from product to product.
Spinach loses 100% of its vitamin C content in seven days at room temperature and 75% if refrigerated. Carrots lose 27% of their vitamin C content when stored at room temperature for a week.
However, when vegetables are frozen, including spinach, they lose significantly less vitamin C, because freezing pauses the process of oxidization.
As soon as produce is harvested, it's a nutritional race against time.
Frozen produce has one problem: before it's frozen, it's blanched - heating food up for a few minutes at high temperatures to inactivate enzymes that degrade texture and color. Blanching also reduces nutrient content.
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Should humanity face a nuclear apocalypse of worldwide war, we need to understand which foods might be safe for survivors to eat, and how long the foods will last.
To understand this, we ne...
Most foods spoil because of the growth of microbes. Preserving food is an attempt to limit microbial growth. Food can be preserved by drying, salting, chilling, or storing in air-tight containers.
Preservatives are used in foods to extend their shelf lives. One of McDonald's Big Mac in Iceland is an example of a long-lasting processed food. It has been on display since 2009, in a glass box. Preservatives that has been discontinued by McDonald's are: