An analysis of nearly 236,000 adults in Britain and Japan found that people consuming the most dietary stilbenes had a lower incidence of lung cancer during roughly 13 years of follow-up, although the observational findings do not establish that the plant compounds prevented cancer.
By yourNEWS Media Newsroom
Adults consuming the greatest amounts of stilbenes — plant compounds that include resveratrol — developed lung cancer less frequently than those consuming the least in an observational analysis spanning two large populations in the United Kingdom and Japan.
Researchers analyzed 177,971 participants from the UK Biobank and 57,971 participants from the Japan Collaborative Cohort Study, creating a combined population of 235,942 adults. None had cancer when observation began, and researchers followed participants for approximately 13 years to identify subsequent lung cancer diagnoses.
Participants with the highest stilbene intake had a 15% lower risk of developing lung cancer in the British cohort compared with those reporting the lowest intake. The corresponding difference was 20% in the Japanese cohort. When researchers pooled results from the two populations, the highest intake was associated with a 17% lower overall risk.
“ That consistency across two very different countries and diets is exactly what makes a nutrition finding worth taking seriously,” according to a NaturalHealth365 account of the research published Sept. 12, 2026.
The findings represent an association rather than proof that stilbenes directly prevent lung cancer. Dietary habits, lifestyle differences and other factors could contribute to the relationship even after researchers statistically adjusted for potential confounders.
Researchers Compared Different Populations and Diets
The use of two cohorts allowed researchers to examine whether the association persisted among populations with substantially different eating patterns.
Stilbenes belong to the broader polyphenol family of plant compounds. Polyphenols have been described as “phytochemicals found abundantly in natural plant food sources with antioxidant properties,” and more than 8,000 compounds within the group have been identified in foods including fruits, vegetables, tea, wine, chocolate and extra virgin olive oil, according to Mercola.com.
Resveratrol is among the best-known stilbenes. A review by Elisabeth Wenzel and Veronika Somoza in Molecular Nutrition and Food Research described it chemically as “3,4′,5-trihydroxy-trans-stilbene,” a polyphenolic compound “accounting to the stilbene class.”
The same review said most naturally occurring plant stilbenes function as antifungal phytoalexins and are “usually synthesized only in response to infection or injury.”
Researchers examined consumption of stilbenes along with other groups of plant compounds, including flavonoids and phenolic acids, and adjusted their statistical models for factors that could otherwise influence lung cancer risk.
Resveratrol has been identified in at least 72 plant species, including foods such as grapes, peanuts and mulberries as well as red wine. Research by C. Alarcón de la Lastra and I. Villegas described resveratrol as occurring in cis- and trans-isomeric forms and noted that ultraviolet exposure can facilitate conversion from the trans to the cis form.
Association Was Strongest Among Men With Smoking Histories
One of the study’s more pronounced findings appeared among men who were current or former smokers.
Men who had ever smoked and consumed the most stilbenes had a 25% lower lung cancer risk than those consuming the least, according to the research. The pattern was observed in both the British and Japanese populations.
No significant association was identified among women or people who had never smoked.
Researchers considered whether the pattern could be related to oxidative stress associated with tobacco-smoke exposure. Stilbenes possess antioxidant and anti-inflammatory properties, and experimental research has examined whether those biological effects can reduce cellular damage associated with oxidative stress.
NaturalHealth365 reported that stilbenes have separately been associated in experimental research with slower tumor growth and reductions in damage caused by smoke exposure.
Resveratrol has also demonstrated anti-inflammatory effects in laboratory studies. Research published in Molecular Nutrition and Food Research found the compound “markedly reduce” cellular COX-2 levels in stimulated peritoneal macrophages during a two-hour experiment.
Those laboratory findings do not establish that resveratrol or other stilbenes prevent lung cancer in humans.
Other plant compounds have also been examined in experimental cancer models. The Textbook of Natural Medicine describes mouse research in which quercetin pretreatment “effectively prevented losses of SOD, catalase, GPx, GSH transferase, and GSH reductase while limiting tumor formation.”
The same source states that quercetin “can increase the life span of tumor-bearing mice by up to fivefold through the activation of mitochondrial apoptosis.” Findings from animal experiments cannot automatically be applied to human cancer prevention.
Researchers involved in the stilbene analysis suggested the absence of a significant association among never-smokers and women could mean any relationship varies with underlying oxidative stress, though the observational data cannot establish that explanation.
Stilbene Sources Varied Between Britain and Japan
How participants obtained stilbenes differed considerably between the two cohorts.
Wine was the leading dietary source among the British participants, while fruit contributed more heavily to stilbene consumption among Japanese participants. Red grapes, berries and other fruits provided resveratrol in both populations.
Grapes contain a range of polyphenols in addition to resveratrol and have been studied for potential antioxidant and anti-inflammatory properties. Reporting by NaturalNews.com has cited research examining grape polyphenols in connection with cardiovascular health and experimental cancer research.
Compounds found in red grapes “that help reduce blood pressure and cholesterol levels have been found to fight cancer in cell culture and animal studies,” according to that reporting.
Separate laboratory research examining compounds derived from turmeric, red grapes and apple peels found that the three substances “work synergistically” in experiments involving prostate cancer cells, according to reporting on work by University of Texas at Austin researchers.
The lung cancer researchers cautioned against interpreting the wine finding as a reason to drink alcohol. Alcohol consumption itself is associated with increased cancer risk, creating an important distinction between obtaining stilbenes from wine and obtaining them from whole foods.
The NaturalHealth365 account stated that “fresh fruit gives a cleaner benefit signal, so grapes and berries make a better daily habit than a glass of wine,” identifying “red and purple grapes, blueberries, blackberries, and cranberries” among foods rich in polyphenols.
Research cited by Mercola.com has also reported that organic foods contained “28% higher levels of stilbenes” and suggested that eating organic fruits and vegetables may “up your antioxidant intake by 20% to 40%.”
Those findings are separate from the UK-Japan lung cancer analysis and do not establish that choosing organic foods reduces lung cancer risk.
Stilbenes May Also Reflect a Broader Dietary Pattern
Researchers noted that participants consumed far smaller quantities of stilbenes than several other classes of polyphenols measured in the study.
That raises the possibility that stilbene intake may partly function as a marker for consumption of foods containing numerous potentially beneficial plant compounds rather than representing an isolated protective factor.
Flavonoids and phenolic acids, which occur in much greater concentrations in foods such as grapes and berries, were independently associated with lower lung cancer risk in the same research.
That overlap makes it difficult to determine whether stilbenes themselves account for the observed association, whether other phytochemicals contribute, or whether people consuming stilbene-rich foods differ in additional ways that affect their risk.
The study also depended on observational dietary data. Researchers did not randomly assign participants to high- or low-stilbene diets, preventing the analysis from establishing cause and effect.
Findings Do Not Replace Established Lung Cancer Prevention Measures
The results add to ongoing research examining whether diet and environmental exposures influence lung cancer risk, but researchers said additional investigation is required.
Other research has produced questions about how substances associated with otherwise healthful foods might interact with lung cancer risk. In research examining pesticide residues on produce and lung cancer among young nonsmokers, USC Norris researcher Dr. Jorge Nieva described the findings as counterintuitive and said they “raise important questions about an unknown environmental risk factor for lung cancer related to otherwise beneficial food,” according to NaturalHealth365.
The stilbene study does not change the established importance of tobacco exposure in lung cancer prevention. Avoiding smoking remains the primary step individuals can take to reduce their risk.
NaturalHealth365 noted that “anyone with a smoking history, current or past, carries longer exposure to the oxidative stress these compounds seem to counter” and suggested that “pairing fruit intake with cruciferous vegetables like broccoli and Brussels sprouts can offer additional detoxification support.”
The new analysis ultimately found a consistent statistical relationship across two countries: adults with the highest stilbene consumption experienced fewer lung cancer diagnoses than those with the lowest intake during long-term follow-up.
The association was most pronounced among men with a history of smoking, but the research cannot determine whether stilbenes themselves caused the lower risk. Further studies would be needed to establish whether the compounds have a direct protective effect, determine effective dietary amounts and separate their influence from the many other nutrients and lifestyle factors accompanying stilbene-rich foods.
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