Cardiovascular health is really three things at once: the pump (heart muscle), the pipes (blood vessels), and what flows through them (lipids, blood pressure). Omega-3s lower triglycerides and calm vascular inflammation; potassium and magnesium are the electrolytes that govern blood pressure and a steady heartbeat; the B-vitamins clear homocysteine, a vessel-damaging amino acid; and vitamin K keeps calcium in bone rather than artery walls. This is the system where decades of small daily inputs compound into the single largest cause of mortality. These 48 whole foods are ranked by how many of the key cardio nutrients a typical serving delivers (≥10% DV each).