Scientists link a strange sugar in red meat to a 63% higher diabetes risk — SkimNews
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- NutriNet-Santé researchers found that the 89,953 French adults consuming the most meat-derived Neu5Gc had a 63% higher type 2 diabetes risk over a median 7.2-year follow-up, during which 966 new cases were recorded
- Dr. Leopold Fezeu of Université Sorbonne Paris Nord presented the findings at the European Association for the Study of Diabetes annual meeting in Milan, Italy
- The Neu5Gc–diabetes link held after adjusting for exercise, overall diet, smoking, and pre-existing conditions, and remained statistically significant — though weakened — after BMI was added
- Dairy-derived Neu5Gc showed no association with diabetes risk, a contrast the authors say suggests the dietary source shapes the effect rather than the sugar alone
- The Neu5Gc–diabetes association weakened and lost statistical significance once total red meat consumption was added to the model, leaving researchers unable to confirm Neu5Gc independently drives risk
- Obesity accounted for only about 13% of the relationship, pointing to mechanisms beyond excess body fat — likely the chronic immune response Fezeu's team calls xenosialitis
- Fezeu called for future studies testing whether anti-Neu5Gc antibody measurements in large cohorts can directly verify the inflammation pathway, and whether replacing beef and lamb with poultry or plant proteins reduces diabetes risk
Why it matters: For decades, the red-meat-diabetes link has been explained largely by weight gain, but this study points to an inflammation pathway through Neu5Gc that operates partly independent of body fat. The lead author explicitly urges future research testing whether replacing beef and lamb — the highest-Neu5Gc foods — with poultry or plant proteins lowers diabetes risk, pointing toward more specific dietary guidance than the generic 'eat less red meat.'
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