You would need extreme intake to overdose
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Studies show most Americans fall short on potassium. A healthy person would need 700 to 800 bananas in a single day to reach a dangerous level from that source alone. Still, excess potassium can harm heart muscle, yet a healthy individual would need roughly 400 bananas in a day to approach that zone. Long before that, fullness and discomfort would stop further eating.
Overall, two bananas a day are a solid choice for most healthy people. Those on beta blockers for heart disease should be cautious since these drugs can raise potassium. People with diabetes may choose not to eat bananas twice daily because they are medium on the glycemic index. Otherwise, enjoy them. Research links higher potassium intake with about a 20% lower risk of death from any physical cause.
