“Leafy vegetables contain chemical nitrate that improves heart health,” the Mail Online reports. In a recent study, researchers looked at the effects of a nitrate-rich diet on rats.Nitrate is a chemical that can react to a number of different substances in a range of ways. For example, it can be used as a fertiliser or as the active ingredient in a bomb. Some nitrates are used as medication for angina, as they dilate the blood vessels.This study found that rats given nitrate had lower levels of red blood cells (which carry oxygen) compared to a control group.
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