Butternut squash makes everything taste better. Plus, this root vegetable is jam-packed with vitamins, antioxidants, and potassium that can help prevent high blood pressure. Largeman-Roth suggests combining roasted butternut squash cubes or slices with lightly salted pistachios on a pizza with fresh mozzarella. Sounds like a meal and a lifesaver all in one! Here are more foods that can help lower blood pressure.