A new prospective cohort study published in Gastro Hep Advances, drawing on data from over 112,000 US nurses and health professionals, found that consuming more than one sugar-sweetened beverage per day was associated with a 2.45-fold higher risk of gastric cancer compared to those who rarely drank them. But context matters: absolute rates were low — 16.3 vs. 7.7 cases per 100,000 person-years — and the findings are observational, meaning causation can't be confirmed.

The broader literature adds layers of complexity. A landmark 2019 NutriNet-Santé study linked each additional 100 mL/day of sugary drinks to an 18% higher overall cancer risk and a 22% higher breast cancer risk. A 2026 World Cancer Research Fund review rated evidence as supporting a probable causal link between sugary drinks and pancreatic and colorectal cancers. Notably, artificially sweetened beverages showed no significant association with gastric cancer, though evidence on artificial sweeteners across all dietary sources remains mixed.

Key Takeaways:

• Higher fructose intake from liquid sources was independently linked to gastric cancer; solid sugar intake was not
• Whole fruit was not associated with increased cancer risk, but 100% fruit juice showed a 12% higher cancer risk per 100 mL/day
• No established evidence supports restricting sugar to improve outcomes in patients already diagnosed with cancer
• Clinicians should counsel patients — especially those with long-term exposure risk — to reduce sugary drink consumption and favor water

Why it matters: With global sugary drink consumption rising, understanding their cancer risk is increasingly relevant. While no single study can tell a patient their habit caused their cancer, the cumulative epidemiological signal is strong enough to warrant clear, practical guidance from clinicians.