Electric kettles are a staple in modern kitchens, valued for their speed and convenience. However, growing concerns have emerged around the safety of certain types of kettles — particularly claims that some may increase the risk of cancer. These concerns largely center on the materials used in manufacturing, such as plastic and low-quality metals, which can potentially release harmful substances when exposed to high heat. While the science is still developing, it’s important to understand the risks, what evidence exists, and how to minimize potential harm from everyday appliances.
One major area of concern involves plastic electric kettles, especially those made from older or low-grade plastic. When heated, some plastics can release chemicals like BPA (Bisphenol A), which is known to be an endocrine disruptor and has been linked in animal studies to cancer and other health issues. While many modern kettles are labeled “BPA-free,” studies suggest that BPA substitutes (such as BPS or BPF) may also have harmful effects. Since boiling water may speed up the release of these substances, using plastic kettles — especially cheaply made ones — could increase long-term exposure to potentially risky chemicals.
Stainless steel kettles are generally seen as safer alternatives, but they’re not without concern. Cheaper or poorly made metal kettles may leach trace amounts of heavy metals such as nickel or chromium, especially if the steel corrodes over time or reacts with hard or acidic water. Chronic exposure to certain heavy metals has been linked to cancer and other health issues, although the levels found in high-quality stainless steel kettles are typically well within safety limits. Nonetheless, repeated exposure from lower-quality metal kettles could raise health concerns if not addressed.
Another overlooked issue is the potential release of microplastics and impurities during boiling. Some plastic kettles can shed microplastic particles into the water, especially after repeated use. Additionally, minerals from hard water can build up inside kettles, creating scale that may trap bacteria or trace metals. While there is no definitive evidence linking these impurities directly to cancer, they may contribute to overall chemical exposure and could affect health over time, especially in households with vulnerable individuals like children or the elderly.
Some users also worry about electromagnetic fields (EMFs) emitted by electric appliances, including kettles. Although EMFs are present in all electronic devices, the levels emitted by electric kettles are extremely low. According to current scientific consensus, there is no conclusive evidence that low-level EMFs from household appliances cause cancer. The far greater health risks come from known environmental carcinogens such as smoking, air pollution, and prolonged exposure to UV rays, rather than from devices like electric kettles.
In summary, while claims that electric kettles “cause cancer” may be exaggerated, there is some truth to the concerns—especially with certain types of kettles made from unsafe or unregulated materials. To minimize any potential risk, consumers are advised to choose kettles made from high-quality, food-grade stainless steel or borosilicate glass. Avoid plastic parts that come into direct contact with boiling water, use filtered water to reduce mineral buildup, and clean your kettle regularly. Taking these precautions can help you continue using your kettle safely and with peace of mind.
