Medically reviewed by Kierra Brown, RD Bananas contain potassium, an essential mineral which can lower blood pressure.Potassium does this by relaxing blood vessel walls and helping the body dispose of ... Health.com: Choose Sourdough For Steadier Blood Sugar, Eat Bananas to Lower Blood Pressure—and 3 More Health Tips Choose Sourdough For Steadier Blood Sugar, Eat Bananas to Lower Blood Pressure—and 3 More Health Tips AOL: These Are Hands Down the Best Foods to Lower High Blood Pressure, Cardiologist Says These Are Hands Down the Best Foods to Lower High Blood Pressure, Cardiologist Says Health on MSN: What happens to your blood pressure when you eat bananas regularly AOL: Here’s Exactly What Happens to Your Blood Pressure When You Eat Bananas Here’s Exactly What Happens to Your Blood Pressure When You Eat Bananas