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Nitrates are one of a type of drug known as vasodilators, that are used to treat angina in people with coronary artery disease or chest pain caused by blocked blood vessels of the heart. They work to control angina by relaxing the coronary arteries so blood can flow more easily to the heart.
Eat More Veggies to Boost Your Dietary Nitrates. Nitrate (chemical symbol NO3-) is an inorganic compound composed of nitrogen and oxygen found naturally in soil and water. The nitrate in our diet comes from both food and drinking water, the highest levels of dietary nitrate are found in vegetables. However, the actual amount of nitrate in vegetables can be highly variable depending on growing conditions.