why are potassium supplements so low for safety reasons but a banana has like 4200mg?

Question

Edit: i confused numbers. Google says a medium banana has 422mg but the recommended amount is anywhere between 2000mg and 4700mg

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Answer 1

read this elsewhere, but potassium apparently can have disasterous effects on your heart if you absorb too much, too quickly.

a banana has it locked up in a bunch of other things, so your body slowly absorbs it as it digests.