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Beyond their nutritional value as a snack, grapes may offer significant skin health benefits. According to recent research, regular intake induces measurable DNA modifications that enhance the body’s handling of UV radiation. With as little as three daily servings over two weeks, grapes were shown to increase skin’s resistance to UV damage.
Polyphenols are bioactive micronutrients present in grapes and various plant-based foods. Known for their antioxidant effects, they may confer some protection against UV radiation. A growing body of evidence supports the potential of polyphenol-rich foods in helping to prevent skin cancer.
The study included participants that followed a restricted diet for two weeks to clear their systems. This was then followed by a two-week intervention period during which they consumed the equivalent of three daily servings of whole grapes, administered as a concentrated freeze-dried powder. Scientists then measured changes in gene expression within their skin, comparing samples taken before and after grape consumption, both with and without mild UV light exposure.
The study revealed that every participant started with their own distinct gene activity signature in the skin. These unique patterns shifted noticeably after eating grapes daily for two weeks, and then shifted once more when the skin was exposed to UV light.
When grape consumption was paired with UV exposure, additional differences were observed. Despite individual variations, grapes altered gene expression in all participants, suggesting they influence pathways linked to skin protection and repair.
While these results are encouraging, they should not be viewed as a substitute for proven sun safety practices. Topical sunscreen and UV-protective clothing are still imperative. Consuming grapes is best done in conjunction with these methods. Further research is necessary to clarify the extent of their benefits relative to conventional sun-protection approaches.
To view the original scientific study click below:
Inter- and Intraindividual Variation of Gene Expression in Human Skin Following Grape Consumption and/or Exposure to Ultraviolet Irradiation
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