Increased dietary potassium intake reduces blood pressure and lowers the risk of stroke and cardiovascular events, particularly in the context of high sodium consumption.

Study: Effect of Salt Substitution on Cardiovascular Events and Death.

This study gave people a special salt that has less sodium and more potassium, and found they had fewer strokes and heart problems than those using regular salt — showing that more potassium can help protect the heart, especially when you eat a lot of salt.

Study: Sodium and potassium intake and risk of cardiovascular events and all-cause mortality: the Rotterdam Study

This study found that people who ate more potassium-rich foods were less likely to die early, especially if they didn’t already have heart problems — which supports the idea that more potassium helps protect the heart, even when eating salty food.

Study: Effect of changes in potassium intake on blood pressure: a dose–response meta-analysis of randomized clinical trials (2000–2024)

This study found that eating more potassium-rich foods lowers blood pressure, especially in people who already have high blood pressure—which is often caused by eating too much salt. Lower blood pressure means less risk of stroke and heart problems, so this supports the claim.

Study: Effect of increased potassium intake on cardiovascular risk factors and disease: systematic review and meta-analyses

Eating more potassium-rich foods like bananas and spinach lowers blood pressure and reduces the chance of having a stroke, especially for people with high blood pressure — and this study proves it.