GRAPES

Purple Grapes & White Grapes were selected to be a part of MonaVie’s blend.
Polyphenols (e.g., resveratrol), mainly in the grape skin provide other suspected health benefits, such as:
alteration of molecular mechanisms in blood vessels, reducing susceptibility to vascular damage
decreased activity of angiotensin, a systemic hormone causing blood vessel
constriction
increased production of the vasodilator hormone, nitric oxide (endothelium-derived relaxing factor)
Anthocyanins tend to be the main polyphenolics in red grapes whereas flavan-3-ols (e.g., catechins) are the more abundant phenolic in white varietie. Total phenolic content, an index of dietary antioxidant strength, is higher in red varieties due almost entirely to anthocyanin density in red grape skin compared to absence of anthocyanins in white grape skin. It is these anthocyanins that are attracting the efforts of scientists to define their properties for human health.