Banana Equivalent Dose
1st November 2023
Banana equivalent dose (BED) is an informal unit of 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 banana. Bananas contain naturally occurring radioactive isotopes, particularly potassium-40 (40K), one of several naturally occurring isotopes of potassium. One BED is often correlated to 10?7 sievert (0.1 ?Sv); however, in practice, this dose is not cumulative, as the potassium in foods is excreted in urine to maintain homeostasis.[1] The BED is only meant as an educational exercise and is not a formally adopted dose measurement.
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