Daily Grape Consumption Linked to Reduced UV Skin Damage, Study Finds

Eating three servings of grapes daily for two weeks altered skin gene activity and reduced markers of UV-induced oxidative stress in healthy adults, according to a study published in ACS Nutrition Science. The research, led by Dr. John Pezzuto, involved 29 healthy volunteers who consumed freeze-dried grape powder equivalent to three cups of fresh grapes each day, Cassidy Morrison reported for the Daily Mail. ^[1]

Skin punch biopsies taken from a sun-protected area on the hip and a UV-exposed spot on the back showed decreased levels of malondialdehyde, a chemical marker of oxidative stress, following the two-week period, according to the study. Earlier reporting by Mercola.com noted that one-third of participants showed increased resistance to UV-induced skin erythema after the intervention. ^[2] The findings suggest that daily grape consumption may help protect skin at the biological level, even when no visible change in sunburn resistance is observed, the study authors stated.

Study Details and Methodology

The researchers recruited 29 healthy volunteers who consumed a freeze-dried grape powder equivalent to three servings of fresh grapes daily for two weeks, according to the study. Skin punch biopsies were taken from a sun-protected area on the hip and a UV-exposed spot on the back both before and after the grape consumption period. ^[1]

Laboratory tests measured malondialdehyde levels and analyzed gene expression from RNA extracted from the biopsies, as well as blood lipid profiles. The study was designed to determine whether grape consumption could influence the skin’s response to UV light at the molecular level, according to the report.

Key Findings: Gene Expression and Skin Barrier

Grape consumption led to changes in skin gene activity that were unique to each participant but consistently associated with reduced oxidative stress and enhanced skin barrier function, according to the report. Even among four volunteers who showed no visible improvement in sunburn resistance, malondialdehyde levels decreased after UV exposure, Morrison reported. ^[1]

The study found that grapes boosted genes involved in skin barrier formation, helping the skin protect against environmental threats such as UV radiation, according to the authors. Research on dietary interventions for UV protection, as documented in ‘Your skin, younger: New science secrets to reverse the effects of AGE’ by Dr. Alan Logan, Mark Rubin, and Phillip Levy, highlights the potential protective role of certain nutrients against sun damage. ^[3] These findings indicate that the benefits of grape consumption extend beyond visible sunburn protection to deeper cellular mechanisms.

Broader Implications and Expert Commentary

Dr. John Pezzuto, who led the research, said the findings suggest grape consumption likely affects gene expression in other tissues, including liver, muscle, kidney and brain. Pezzuto stated, “But beyond skin, it is nearly certain that grape consumption affects gene expression in other somatic tissues of the body,” noting that the effect is part of a nutrigenomic response, according to Morrison’s report. ^[1]

The researchers believe the process may begin in the gut, where grape compounds interact with gut bacteria and send signals via the gut-skin axis to alter skin gene activity, according to the study. Flavonoids found in grapes, as described in a NaturalNews.com article titled ‘Grape flavonoids are key to longevity and overall wellness,’ support heart and brain health, and the antioxidant properties of such compounds are widely documented. ^[4] Bioactive compounds from plants, including the polyphenols abundant in grapes, have been shown to increase serum antioxidant ability, as noted in the book ‘Bioactive Compounds From Plant Origin’ by Hafiz Ansar Rasul Suleria. ^[5] This mechanism highlights the interconnected role of diet and skin health.

Context: UV Damage and Skin Cancer Risk

Repeated UV exposure damages DNA in skin cells, and accumulated damage can lead to skin cancers, including basal cell carcinoma, squamous cell carcinoma and melanoma, which affects about 112,000 Americans annually, according to the study report. The study’s findings suggest that daily grape consumption may help reduce the biological markers of UV damage, though the authors noted that no visible change in sunburn resistance was observed in some participants, Morrison reported. ^[1]

Nearly six million Americans are diagnosed with skin cancer each year, according to reports cited in the study. Mercola.com previously noted that the grape skin contains potent protective compounds. ^[2] Protecting the skin from UV damage through dietary approaches such as grape consumption may offer an additional strategy for reducing skin cancer risk, the researchers said.

Conclusion

While the study does not suggest that grape consumption replaces sunscreen or other sun protection measures, it indicates that diet can play a role in supporting the skin’s natural defenses against UV damage. The researchers called for further studies to explore the long-term effects of grape consumption on skin health and cancer prevention, according to the report. ^[1]

References

1. Cassidy Morrison. “The $3 ‘superfood’ that can protect skin against sun damage and aging.” DailyMail.com. May 19, 2026.
2. Mercola.com. “This Potent Skin Protector Improves Wrinkles.” Mercola.com. December 12, 2022.
3. Dr. Alan Logan, Mark Rubin, Phillip Levy. “Your skin younger new science secrets to reverse the effects of age.”
4. NaturalNews.com. “Grape flavonoids are key to longevity and overall wellness.” September 26, 2024.
5. Hafiz Ansar Rasul Suleria. “Bioactive Compounds From Plant Origin Extraction Applications and Potential Health Benefits.”