Leafy veg including spinach, lettuce and kale, as well as beetroot and celery are some of the biggest natural sources of nitrates. These naturally occurring nitrates are thought to have health. You may have heard of nitrates, but do you really know what they are? And do you know what foods contain them? Learn why and how to avoid them. Nitrates are molecules made of nitrogen and oxygen that are found naturally in air, soil, water, and some foods. Some of the foods high in nitrates are green leafy vegetables and root vegetables. Nitrates themselves aren’t inherently dangerous. The problem starts when they convert into other compounds inside your body, some of which are linked to cancer, oxygen deprivation in infants, and thyroid disruption. “Nitrates and nitrites are natural chemicals that are found in soil and water as part of the earth’s nitrogen cycle,” Peart explains. “They’re naturally present in the human body and in some foods, and nitrates are also added to some foods.” What are nitrates and nitrates? Nitrates and nitrites are naturally occurring chemicals that are both made up of nitrogen and oxygen (with one extra oxygen molecule on nitrates). They are found. Nitrates are medications used for treating or preventing heart pain (angina, chest pain) caused by heart disease, usually of the arteries in the heart. Nitrates are vasodilators (dilators of blood vessels that increase their diameter) that allow blood to flow more easily. Here's the difference between harmful and healthy nitrates in foods, plus their top benefits, according to registered dietitians Composed of just nitrogen and oxygen, nitrates are simple compounds that occur naturally in our bodies. Nitrates are also found in both healthy and unhealthy foods — and in medications used to treat the squeezing chest discomfort known as angina. Nitrate is a polyatomic ion with the chemical formula NO3−. Salts containing this ion are called nitrates. Nitrates are common components of fertilizers and explosives. [1] Almost all inorganic nitrates are soluble in water. An example of an insoluble (inorganic) nitrate is bismuth oxynitrate.