This is because potassium lessons the effects of sodium (i.e. salt), which is notorious for increasing blood pressure readings.
“Potassium also helps to ease tension in your blood vessel walls, which helps further lower blood pressure,” added the American Heart Association.
There is a caveat, however, when it comes to incorporating more potassium into your diet.
People who have kidney disease should speak to their GP before consuming more bananas, for example, as excess potassium can be harmful.