Nitrites are easily absorbed by plants through roots, as it is found in soil as a primary source of nitrogen. Fruits and vegetables, especially the root vegetables, are rich in nitrates. The increase in the distance of fruit or vegetable from the root decreases the nitrate content in it. The fruits rich in nitrate are strawberries, gooseberries, currents and raspberries. And the vegetables with high amount of nitrates are lettuce, green beans, spinach, radishes, celery, beets, carrots, parsley, cabbage, and collard greens.

Nitrate present in the body is converted to nitrites by bacteria present on your tongue. This nitrate is converted to nitric oxide in your blood, this helps to relax the blood vessels. According to a study done by Functional Biochemistry in Health and Disease, suggests that when nitric oxide is high in blood vessels the blood pressure will be at its lowest. Another property of nitric oxide is preventing inappropriate blood clotting.

If an individual is suffering from difficulty in expanding or contracting blood vessels and has thick blood, which clots easily, then drinking beet root juice, which is rich in nitric acid, will within hours, will bring down high blood pressure, stated research done by Baker IDI Heart and Diabetes Institute in Melbourne, Australia.

Drinking juices made up of fresh fruits and vegetables brings out a variety of health benefits. According to the World Health Organization (WHO) and its fruit and vegetable promotion (FAO) initiative, low consumption of fruits and vegetables are identified as important risk factors for chronic diseases. And about 2.7 million lives can be saved each year if consumption of fruits and vegetables is increased, reported the website examiner.