How dangerous is cooking with a microwave really? - How Microwaves Revolutionized Kitchens—and Why They're Safer Than You Think

Microwaves have become a kitchen staple since their introduction in the late 1940s. Today, nearly three-quarters of households own one, yet questions about safety and proper use remain. Recent guidance highlights simple steps to ensure food is heated evenly and safely.

The technology behind microwaves dates back to 1945, when Percy Spencer discovered microwave heating. The first commercial model, sold in the USA in 1947, was massive—weighing 340 kg and standing 1.80 meters tall. By the 1970s, smaller versions began appearing in German homes.

Microwaves cook food using electromagnetic radiation, which can bake, grill, and brown just like conventional ovens. Despite concerns, this radiation poses no health risk. It drops off quickly with distance and only escapes through the door or window in tiny amounts. Certified microwaves emit just one percent of the legal leakage limit of 5 milliwatts per square centimetre, making them safe even for pregnant women and small children.

To avoid uneven heating, food should be stirred occasionally during cooking and left to stand briefly afterwards. Metal, melamine tableware, and tightly sealed containers should never be used in a microwave. While some worry about nutrient loss, microwaving does not destroy more nutrients than stovetop or oven cooking when done correctly.

Parents are also reminded to test baby food temperature before serving, as microwaves can create hot spots that may scald.

Microwaves remain a convenient and safe way to prepare meals when used properly. Following basic guidelines ensures even heating and minimises risks. With nearly 75% of households relying on them, their role in modern cooking is firmly established.