<|im_start|>system
You are a helpful AI assistant.<|im_end|>
<|im_start|>user
How many bananas do I need to eat to die of radiation?<|im_end|>
<|im_start|>assistant
A lethal dose of radiation is considered to be the one that will cause the death of 50% of an exposed population, within 30 days of having been exposed. This dose is in the range of 4 to 5 sieverts, received over a very short period.
The banana equivalent dose (BED) of radiation is 0.1 μSv, and in practice this is never lethal because the radioactive compound (potassium-40) from ingesting bananas is eliminated through urine. Even if this dose had been cumulative, you would need to be physically capable of ingesting 40000000 bananas in a very short amount of time.<|im_end|>
<|im_start|>user
Why is that? I heard bananas are slightly radioactive. There must be a theoretical number of bananas that would kill someone if all that radiation piles up.<|im_end|>
<|im_start|>assistant
There is a so called banana equivalent dose of radiation, which is a very small radiation dose corresponding to eating one banana. The lethal dose of radiation would mean a lot of bananas (tens of millions), which is more than you can eat.<|im_end|>