Ask the doctor: Does potassium lower blood pressure?
Second, do you already have high blood pressure? In people who already have high blood pressure (hypertension) and who don't eat a lot of potassium-rich foods, more dietary potassium definitely lowers blood pressure. In people who do not yet have high blood pressure, eating potassium-rich foods probably protects against getting high blood pressure. People who don't eat a lot of potassium-rich foods are more likely to develop high blood pressure and have a stroke.
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