What Is Radioactive In Bananas?

There is a naturally high concentration of potassium in bananas, and there is also a trace amount of radioactivity in potassium. Each banana has the potential to release 0.1 microsieverts, or.01 millirem, of radiation. Brazil nuts, much like bananas, are high in potassium, but in addition to that, they also have a trace amount of radium that they have absorbed from the ground in which they were cultivated.