A major new study from Harvard-affiliated researchers ties daily sugar-sweetened beverage consumption to a dramatically higher risk of stomach cancer, at a time when nearly two-thirds of American adults drink at least one such beverage every day.
Researchers at the Mass General Brigham Cancer Institute in Boston analyzed data from more than 100,000 participants and found that people who drank one or more sugary drinks per day faced 2.45 times the risk of developing gastric cancer compared with those who consumed fewer than one serving per month. For women who drank more than one sugary beverage daily, the risk jumped to more than threefold, Fox News Digital reported.
The findings, published in the journal Gastro Hep Advances, land against a troubling backdrop. Gastrointestinal cancers are rising among younger Americans, a trend that public health officials have struggled to explain. The study's senior author, gastroenterologist and epidemiologist Andrew T. Chan, pointed directly at the American diet.
Chan told Fox News Digital that the pattern is unmistakable.
"It's definitely a concern because we are seeing an increase in cancers of the gastrointestinal tract, particularly in young people [under] 50."
He went further, connecting the dots between rising cancer rates and what Americans pour into their bodies every day.
"Our increasing consumption of sugary drinks and also [ultra-processed foods] is likely to be contributing to some of these cancer trends."
That assessment carries weight. Chan's team drew on two of the longest-running dietary studies in American medical research, the Nurses' Health Study and the Health Professionals Follow-Up Study, both managed by Harvard-affiliated researchers. The studies have tracked links between lifestyle, diet, and chronic disease among healthcare workers for decades.
One of the study's sharpest findings separated sugar-sweetened drinks from their diet counterparts. Artificially sweetened beverages, diet sodas and other low-calorie carbonated drinks, showed no increased gastric cancer risk among the more than 100,000 subjects. The culprit, researchers found, was fructose. Higher fructose consumption tracked with greater stomach cancer risk.
The distinction matters. Americans who switched to diet drinks years ago out of general health concerns may have inadvertently dodged a more specific danger. Those who stuck with regular soda, sweetened teas, fruit punches, and other sugar-loaded beverages did not.
And the numbers suggest most Americans are still drinking the real thing. CDC data shows roughly 63 percent of U.S. adults report consuming sugar-sweetened beverages at least once a day, the exact threshold the study identifies as a major risk factor.
Gastric cancer has long been linked to infection with H. pylori, a bacterium that damages the stomach lining. But in a subset of participants, the Mass General Brigham team found no connection between sugary drink intake and H. pylori status. The association between sugar-sweetened beverages and stomach cancer appeared to operate independently of that well-known risk factor.
Earlier research had already tied sugary drinks to higher rates of liver, breast, and colorectal cancers. This study adds gastric cancer to the list, and does so with a large cohort and long follow-up period.
For all the alarm the numbers invite, Chan was careful about what his data can and cannot show. The study was observational, meaning it identified a correlation but could not establish a direct cause-and-effect relationship.
"The study is unable to really prove cause and effect. What we did see was an association. We certainly need to do more research to understand whether this association between sugary-sweetened beverages and stomach cancer is truly causal."
That caveat is standard for this kind of epidemiological work. But a 2.45-times elevated risk, and a threefold increase for women drinking more than one sugary beverage daily, is not a rounding error. It is the kind of signal that demands follow-up, and Chan's team knows it.
The study also carries a demographic limitation. Participants were predominantly White healthcare professionals. Whether the findings hold across other racial and ethnic groups remains an open question, one the researchers themselves have flagged for future work.
Strip away the caveats and the picture is simple. A daily sugary drink habit, one shared by nearly two out of every three American adults, is associated with a dramatically higher risk of a cancer that is already on the rise, especially among people under 50. The proposed mechanism centers on fructose, the primary sweetener in most of those beverages. And the trend lines are moving in the wrong direction.
None of this requires a government mandate or a new regulatory regime to act on. It requires individual Americans to read the label, count the grams, and decide whether the can in their hand is worth the odds.
