Preliminary research presented at the European Association for the Study of Diabetes highlights a potential biological mechanism linking red meat consumption to increased risk of type 2 diabetes, focusing on the role of the sugar Neu5Gc and its immune response.
Scientists have long suspected that high red meat consumption is linked with a greater risk of type 2 diabetes, but new preliminary work points to a more specific biological mechanism. According to a report by Knowridge on research presented at the European Association for the Study of Diabetes annual meeting in Milan, a sugar found in mammalian meat, known as Neu5Gc, may help trigger an immune response that contributes to long-term inflammation. Humans no longer make the molecule themselves, yet small amounts can still be absorbed from foods such as beef and lamb.
The new analysis, which drew on data from almost 90,000 adults in the French NutriNet-Santé cohort, estimated participants’ intake of Neu5Gc from meat, processed meat, dairy products and other sources. Over roughly seven years of follow-up, 966 people developed type 2 diabetes. Those with the highest intake of meat-derived Neu5Gc had a 63% higher risk than those with the lowest intake after researchers adjusted for other health, dietary and lifestyle factors, according to the conference summary and the Knowridge report.
The pattern appeared to strengthen across intake groups, with the second-highest category showing a 41% higher risk than the lowest. Researchers also estimated that obesity explained only part of the association, accounting for about 13% of the relationship, which leaves open the possibility that inflammation or other pathways are involved. At the same time, the finding became less convincing after the team adjusted for total red meat intake, suggesting that Neu5Gc may not be the sole explanation and that other components of red meat, such as heme iron, could also matter.
No clear association was seen for Neu5Gc from dairy foods, which may mean the source of the sugar matters, although the reason is not yet clear. The work remains observational and preliminary, so it can show correlations but cannot prove causation, and the authors said further studies should measure Neu5Gc antibodies directly and look more closely at how the molecule interacts with other meat-related compounds. That caution fits with earlier NutriNet-Santé research linking processed meat additives and ultra-processed food consumption to a higher diabetes risk, reinforcing the idea that diet quality may influence risk through several different mechanisms.
Disclaimer: This content is for informational purposes only and is not intended to be a substitute for professional medical judgment, advice, diagnosis, or treatment.
