Antioxidant. Blood pressure reduction. Blood sugar regulation. Cardiovascular health. All beans are rich in fiber, which aids in digestion and elimination and slows the release of sugars into the bloodstream. The soluble fiber found in beans is also linked to lower heart attack rates. Generally, beans are extremely high in antioxidants and minerals, particularly manganese, phosphorus, iron, and magnesium. Lentils are also an outstanding source of potassium, and a large clinical study found a link between high levels of potassium and lower blood pressure.