Are Microwaves Safe for Cooking?

How microwaves cook food

Microwave ovens utilize microwaves to target water molecules in food, inducing movement and generating heat through the friction caused by this movement. As these waves pass through the food, no ions or subatomic particles enter, ensuring that the meal does not become radioactive.

Some sources discussing microwave safety may caution against the dangers of molecular “excitability” or protein breakdown. However, it’s important to note that molecular movement increases with higher temperatures, and proteins undergo alterations in all cooking methods.

Is microwaving food bad for you?

While it is true that microwave ovens produce electromagnetic radiation, it is not the dangerous radiation associated with nuclear disasters. Instead, it is a non-ionizing radiation which is like the radiation from your laptop and cell phone. As long as your microwave is in good condition, there shouldn’t be any risk of harm.

With traditional cooking, the outside of food gets hotter than the inside but with microwaving, the inside of food can get burning hot while the outside remains relatively cool. That is where many of the injuries come from. Even so, burns from cooking on a stove are much more common and severe than reported microwave burns.

Fear of microwaves is not science-based. We are surrounded by devices that emit minute quantities of electromagnetic radiation. A microwave may be about as dangerous as a laptop. Maybe less, as we don’t hold it in our lap while it operates.

Antioxidant levels in microwaved vegetables

Research studies compared the antioxidant levels in vegetables following different cooking methods and found that microwave-cooked vegetables exhibited significantly higher antioxidant retention compared to those that were boiled or fried. Surprisingly, the microwave method preserved the healthful properties of vegetables even more effectively than steaming or pressure cooking.

Plastics in microwaves

According to Dr. Michael Greger, MD, with NutritionFacts.org, heating food in plastic containers has been demonstrated to result in the absorption of hormone-disrupting compounds like Bisphenol A (BPA).

The absorption tends to be higher when plastic is in contact with fats, oils, or during prolonged cooking. Opting for glassware when microwaving food helps to steer clear of these estrogen-mimicking compounds.

Microwave safety myths BUSTED

1. Myth: Microwaves destroy nutrients in food– BUSTED: Research studies analyzed the antioxidant levels in vegetables after employing various cooking techniques, revealing that vegetables cooked in a microwave retained antioxidants to a significantly greater extent than those subjected to boiling or frying. Unexpectedly, the microwave approach proved more adept at preserving the beneficial properties of vegetables compared to both steaming and pressure cooking.
2. Myth: Microwaved water kills plants– BUSTED: Microwaving water merely elevates its temperature without affecting its structure or energy. This article from Snoops should help dispel any myths, Microwaved Water: See What it Does to Plants. 
3. Myth: Microwaves are banned in Germany – BUSTED: Microwaves are not banned in Germany. 74% of households there own them. Germany has some of the highest safety standards in the world and most of the homes have them.

How microwaving affects nutrition in food

Dr. Michael Greger explains that microwaving is one of the best cooking methods for preserving nutrients in food. Heat, water, and time are the main factors that lead to nutrient loss, and microwaving typically uses less water and shorter cooking times than boiling or steaming. This means vegetables often retain more antioxidants and vitamins when microwaved compared to many other cooking methods.

He emphasizes that fears about microwaves destroying nutrients—or being unsafe in general—are not science-based. In fact, research shows microwaving is safe and may even protect certain nutrients better than traditional cooking.

Vegetables cooked in the microwave retained their antioxidant power significantly above those boiled or fried—and even surpassed steamed or pressure-cooked vegetables.

The Bottom Line

Microwaves are a safe, efficient, and incredibly convenient and healthy cooking method. Research does not show that they are harmful and in fact, some evidence suggests that they outperform other cooking methods in preserving nutrients in foods.

The biggest dangers of microwaves appear to come from burns, splashes, and dropping them. It is also a good idea to cook in glassware rather than plastics.

Research on microwave safety

Below are several articles from reliable sources such as Harvard Health and the World Health Organization (WHO) that confirm the safety of microwaves.

• Microwave Cooking and Nutrition / Harvard Health
• Radiation: Microwave Ovens / WHO World Health Organization
• Microwave Ovens & Their Hazards / CCOHS
• Is Microwaved Food Safe? / ABC Health & Wellbeing
• Does Microwaving Food Remove its Nutritional Value? / CNN
• How Safe is Your Microwave? / Washington Post
• 11 Surprising Facts and Myths About Microwave Ovens / Good Housekeeping
• Best Cooking Method / NutritionFacts.org