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Grape-Derived Polyphenols Protect Skin From Harmful Effects Of UV Radiation

July 29, 2011: 06:43 PM EST
A study by Spanish scientists has found that certain polyphenol compounds (flavonoids) extracted from grapes can reduce the formation of “reactive oxygen species” (ROS) in human skin cells exposed to long-wave (UVA) and medium-wave (UVB) ultraviolet radiation. UV rays activate ROS compounds, which in turn oxidize macromolecules such as lipids and DNA and stimulate certain reactions leading to cell death. The polyphenols in grapes, however, inhibit formation of ROS compounds, thus protecting the skin from the sun’s ultraviolet radiation. The scientists say their findings support the use of grapes or grape derivatives in sun protection products.
Cecilia Matito, et al., "Protective Effect of Structurally Diverse Grape Procyanidin Fractions against UV-Induced Cell Damage and Death", Journal of Agricultural and Food Chemistry, July 29, 2011, © American Chemical Society
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