Relaxing your blood vessels and reducing the amount of LDL cholesterol in your blood can have a very positive effect on your overall heart health. In the context of a heart-healthy diet, the study showed that adding as little as one serving of pistachios per day can reduce cholesterol and improve arterial flexibility. Both of these effects allow the heart to pump more efficiently. When your heart doesn't have to work as hard to move blood throughout your body, your risk of heart disease is reduced. In fact, high cholesterol is a major risk factor for heart disease, so by lowering your LDL level, you can lower your risk of developing serious heart problems like coronary heart disease. Pistachios are also loaded with antioxidants, which are excellent for heart health.

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