Resveratrol Research and Recommendations
The red or purple grape juice is beneficial to avoid various heart diseases. The grape juice relaxes your blood vessels. Thus the blood flow through the vessels becomes easy. The dark red and purple grapes have an antioxidant property which retards the activities of the free harmful and poisonous free radicals. Another important resveratrol is also present in the grape juice. Resveratrol grape juice has an antioxidant property, especially present in the juice prepared from the dark purple concord grapes.
The grapes that have the highest resveratrol concentration are the dark red skinned and then the purple skinned. They have much more resveratrol in them than the green grapes.