Comment Re:caesium 137 bioaccumulates (Score 3, Informative) 114
caesium 137 bioaccumulates.
Concentrates its way up the food chain.
There is no safe minimum dose once it is in your body, slowly disintegrating, radiating into your organs and cells.
Cesium accumulates in your body because it's chemically similar to potassium, which your body needs for nerves to function (among other things). So it can accumulate no more than potassium does.
Potassium has a naturally occurring radioactive isoltope, K-40, which like Cesium undergoes both beta and gamma decay. The amount of K-40 in the typical human body contributes 4000-5000 becquerel to your natural radiation dose. So your contention that there is "no safe minimum dose once it is in your body" is clearly wrong. Everyone who has ever lived has been exposed to a relative "huge" amount of radiation from K-40 throughout their entire lives, and our species is still here.