You probably have heard that a diet rich
in vegetables can support heart health and some researchers now believe it is
the nitrates naturally found in all vegetables, but especially rich in beets
and leafy vegetables, that are responsible for the heart healthy benefits of
vegetables. Dietary nitrates are converted to nitric oxide in the body
which dilates blood vessels and lowers blood pressure. Nitric oxide
provides many other health benefits too in addition to improved blood flow;
including enhanced exercise performance, reduced stickiness of platelets,
improved cholesterol metabolism, and improved calcium metabolism which helps
reduce calcium deposits that contribute to the formation of atherosclerosis or
narrowing of your blood vessels.
Beets also contain antioxidants; the
polyphenols quercetin and resveratrol; and folate (vitamin B-9) and betaine,
substances which reduce free radical damage and inflammation. Many
studies on hypertension have found that drinking 16 ounces of beetroot juice
could lower both the systolic (top number) and diastolic (bottom number) blood
pressure anywhere from 4-10 points starting just two and a half hours after
ingestion. These effects were maintained as long as one continued to consume
beet juice with the peak effect seen after 12 days.
Fortunately, if one does not like beets,
many other vegetables are rich in nitrates too. And while “nitrate
levels in vegetables and vegetable juices can vary considerably, depending on
many factors, including the environment (humidity, temperature, sunlight
exposure, water available to growing plants), agricultural (use of herbicides
and nitrogen-based fertilizers) and genetic factors of the plant,” leafy greens
in general are a rich source of nitrates. At the top of this list are
vegetables such as celery, lettuce, spinach, arugula, Chinese cabbage, endive,
fennel, kohlrabi, leeks and parsley. (2015,
Nutrition Dimension, “Beetroot juice &” Pg 20-25, ContinuingEducation.com.)
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