Bananas are Naturally Radioactive
Bananas contain potassium, a mineral that is essential for our bodies but also happens to be weakly radioactive. Most potassium is stable, but about 0.01% of natural potassium consists of the radioactive isotope potassium-40. Don’t be alarmed; the radioactivity in bananas is so low that it poses no risk to human health. You would need to consume an enormous amount of bananas in a short time to experience any significant radiation exposure. In fact, you receive more radiation from everyday sources like the soil, the sun, and even some building materials. Bananas are a tasty source of potassium, and their radioactivity is nothing to worry about.