Banana radiation dose example really bothers me. Assuming a human has about 140g of potassium [1], a single banana has up to about 0.5g [2] and a yearly radiat

Banana radiation dose example really bothers me. Assuming a human has about 140g of potassium [1], a single banana has up to about 0.5g [2] and a yearly radiation dose from ~140g of potassium is 390uSv [3], in order to get a banana dose of 0.1uSv [3][4], the banana's potassium would have to increase the total amount of potassium in the body by 0.5g for 365d / (0.5g / 140g * 390uSv / 0.1uSv) = 26 whole days. Expecting the body to contain the extra potassium for more than a day or so is totally unrealistic and misleading. A proper banana dose would probably be in the neighborhood of (0.5g/140g * 390uSv / 365 d) = 0.004uSv (dose from 0.5g of extra potassium over a single day). To make matters worse, the wikipedia article references the comic - that does not accept corrections - as a source. [1] https://ods.od.nih.gov/factsheets/Potassium-HealthProfessional/ https://ods.od.nih.gov/factsheets/Potassium-HealthProfession... [2] https://www.leaf.tv/articles/how-much-potassium-is-in-a-banana/ https://www.leaf.tv/articles/how-much-potassium-is-in-a-bana... [3] https://xkcd.com/radiation/ https://xkcd.com/radiation/ [4] https://en.wikipedia.org/wiki/Banana_equivalent_dose https://en.wikipedia.org/wiki/Banana_equivalent_dose