Homemade baked beans on wholegrain toast are far healthier than the tinned version as tinned baked beans contain high levels of added sugar. The tomatoes and cannellini beans also offer a rich source of potassium and magnesium. Potassium is known to lower blood pressure. Of late, a greater emphasis has been placed on getting adequate potassium in the diet along with calcium and magnesium to prevent and control high blood pressure. High blood pressure is a major risk factor for cardiovascular disease.