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

There are much stronger prescription strength potassium supplements out there though. They go in increments of 20 mEq (780 mg). Either tablets or liquid. At one point I was up to 100 mEq (3900 mg) of liquid daily.