This claim is accurate based on current scientific evidence. According to Verywell Health, microwaves use “non-ionizing radiation, which does not cause DNA damage or make food radioactive.” In other words, the type of energy microwaves emit isn’t strong enough to alter cells in a way that leads to cancer.
The U.S. Food and Drug Administration (FDA) supports this, explaining that microwave ovens are designed to keep radiation within the appliance, and even if some leaks occur, the levels are “well below the limit considered harmful to humans.” Similarly, the American Cancer Society states that “when microwave ovens are used according to instructions, there is no evidence that they pose a health risk.”
Microwaves, are in the non-ionizing end of the electromagnetic spectrum, which means they can heat food but not ionize atoms or molecules. The World Health Organization (WHO) emphasizes the difference by stating that non-ionizing radiation "is not recognized as a cause of cancer."
One detail to consider is that risks can occur if people misuse microwaves, such as by heating food in certain plastics that can emit harmful chemicals. However, this isnt about microwave radiation itself, but the materials used. So yeah, when used properly, microwaves do not cause cancer and are a safe household technology.
The claim is true and well-supported.