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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It really comes down to the death issue. In the US, a supplement can only contain 100 mg of potassium because it can cause heart arrhythmia and heart attack among other issues. Without blood work, people do not usually know their potassium is high. This is an issue because medications from pain killers to blood pressure meds (not all) can raise blood potassium levels.
You need ten of those 420 mg bananas to get your daily recommended potassium, and your body isn’t going to absorb it all and certainly not in a short time. You can get prescriptions for higher doses of potassium, those tend to be extended release (maybe all are) to minimize risks of a large amount of potassium in a short time.
There is an example of a man who OD’ed on potassium by drinking large amounts of coconut water. When I realized how much potassium coconut water has, I googled it out of curiosity. What many don’t realize is that salt substitutes are typically (maybe always) potassium. They can be dangerous.
You can regulate potassium levels in supplements, you can’t regulate the levels in a banana.
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