A<unk>  contains naturally occurring radioactive material in the form of potassium-40.<unk>  (BED) is an informal measurement of ionizing radiation exposure, intended as a general educational example to compare a dose of radioactivity to the dose one is exposed to by eating one average-sized<unk> .<unk> s contain naturally occurring radioactive isotopes, particularly potassium-40 (40K), one of several naturally occurring isotopes of potassium. One BED is often correlated to 10 sievert (0.1 μSv); however, in practice, this dose is not cumulative, as the potassium in foods is excreted in urine to maintain homeostasis. The BED is only meant as an educational exercise and is not a formally adopted dose measurement.
Banana equivalent dose
Equivalent dose
Lethal dose
Measured environmental concentration
Oxygen equivalent
Relative value unit
Effective dose 
Peak-to-trough ratio