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The one to the phenols (Polyphenols) counting substance was first isolated and identified in knotweed plants (Polygonum cuspidatum) in 1963. It is an antioxidant (antioxidant) and is found in plants and plant foods, especially in peanuts, raspberries, mulberries and also grapes available. In the vine, resveratrol in leaves and berry shells is made from wrong mildew or Botrytis infested vines, as well as under stress conditions such as UV light formed as a defense response. It is a natural one, so to speak fungicide, Such substances are also called phytoalexins, The resveratrol content is much higher in grapes or wines from cool and damp areas than in dry and warm areas. It is particularly present in the skins of dark grapes in more than five times the amount of light colored ones.

Resveratrol crystals under a microscope / grape with black berries

Resveratrol in wine can be a positive one health Have a beneficial effect by preventing platelets from clumping together. The phenomenon was discovered in the USA in the 1980s and under the catchphrase French paradox known worldwide in a short time. In the meantime, in vitro studies have shown potential effectiveness against cancer cells. Resveratrol kills them by inhibiting a protein that is important for the survival of cancer cells. Other studies have shown positive effects in autoimmune deficiency, arteriosclerosis, arthritis and heart disease. Most recently, scientists from the University of Wisconsin found out through laboratory tests that age-related changes in heart function are dampened and the aging process can be slowed down. The required amount of resveratrol is already achieved with a daily glass of red wine. See also under anthocyanins,

Left: Von Kuebi = Armin Kübelbeck - Own work, CC BY-SA 3.0 , Link

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