RED POTATO: Potassium and fiber in red potatoes benefit your cardiovascular health. Potassium helps regulate blood pressure levels and a low-potassium diet puts you at risk for high blood pressure, a risk factor for heart disease. It also supports muscle function, including muscle tissue found in the heart and blood vessels. A large red potato increases your potassium intake by 1,679 milligrams of potassium or 36% of the recommended daily intake. It also contains 6.3 grams of dietary fiber, 17 and 24% of the recommended daily intake for men and women, respectively. Fiber decreases blood cholesterol levels and reduces the risk of coronary artery disease.