Recently, scientists discovered that pomegranate juice may enhance the bioactivity of nitric oxide synthase in endothelial cells. Furthermore, pomegranate’s antioxidant properties help to protect nitric oxide from oxidative destruction.. Pomegranate juice has also been shown to support the positive expression of nitric oxide synthase in both healthy and unhealthy blood vessels.
According to a study published in a June 2010 issue of Science Daily, the nitrates in beetroot juice can be beneficial because they have been shown to increase the amount of nitric oxide in the blood and consequently widen blood vessels, support circulation, and support normal blood pressure.