Natural radioactive foods...

Bananas are naturally radioactive due to the presence of high potassium and it's natural radioactive isotope k-40.

Potatoes, sunflower seeds and kidney beans are also radioactive but they are measured in terms of banana equivalent dose. you will certainly die from radiation poisoning if you are able to eat 10,000,000 bananas at once.

Scientists and engineers use radioactivity as a source of heat for satellites, for medical imaging, for targeted cancer treatments, for radiometric dating, and for research into the laws of nature and the origin of matter but the dose of radioactivity they deliver is not enough for this.