Preliminary findings presented at the European Association for the Study of Diabetes (EASD) annual meeting in Milan, Italy, from September 28 to October 2, 2026, indicate that individuals with the highest intake of N-glycolylneuraminic acid (Neu5Gc), a sugar primarily found in red meat, had a 63% higher risk of developing type 2 diabetes. Dr. Leopold Fezeu from Université Sorbonne Paris Nord, Bobigny, France, led the observational study.

This research provides new insights into how diet, particularly specific components of red meat, may contribute to type 2 diabetes, a condition affecting millions globally. Understanding these mechanisms could inform future dietary recommendations aimed at prevention.

What the Records Show

The study analyzed data from 89,953 French adults who participated in the NutriNet-Santé prospective observational cohort. Researchers found that adults consuming the highest amounts of meat-derived Neu5Gc faced a 63% greater risk of developing type 2 diabetes compared to those with the lowest intake. This association remained statistically significant after adjusting for established risk factors such as age, sex, physical activity, overall diet quality, smoking status, and existing health conditions. While the association weakened after accounting for body mass index (BMI), it still held statistical significance. Obesity mediated only about 13% of the observed association.

Neu5Gc is a sugar molecule produced by most mammals, but humans lost the ability to produce it due to an ancient genetic mutation. It is found primarily in red meats like beef and lamb, and in smaller quantities in dairy products. When humans consume these foods, animal-derived Neu5Gc can incorporate into human tissues. The human immune system may then recognize Neu5Gc as a foreign molecule, potentially triggering a sustained immune response, a process known as xenosialitis. Researchers propose this chronic inflammation as a mechanism linking Neu5Gc to type 2 diabetes. Neu5Gc from dairy products showed no such association with diabetes risk.

What the Subject Has Said Publicly

Dr. Leopold Fezeu stated, “Our findings support chronic inflammation as a specific mechanism linking red meat consumption with T2D, partly beyond the amount of red meat a person eats and partly independent of body fat”. He highlighted the importance of these findings given the prevalence of red meat in Western diets and suggested exploring poultry or plant-based proteins as alternatives for type 2 diabetes prevention.

What We Could Not Confirm

These findings are preliminary and have not yet undergone peer review. The study is observational and cannot establish a direct cause-and-effect relationship between Neu5Gc intake and type 2 diabetes. The association between Neu5Gc and type 2 diabetes also weakened and lost statistical significance when total red meat consumption was accounted for in the analysis. This suggests that other components of red meat, or their combined effect with Neu5Gc, might also play a role in the observed risk.