A recent observational study in France links a specific sugar found in beef and lamb, called Neu5Gc, to a higher risk of developing type 2 diabetes. Because humans lost the gene to produce Neu5Gc long ago, our bodies treat the dietary molecule as a foreign substance, triggering a persistent immune reaction known as xenosialitis. Participants with the highest intake of meat-derived Neu5Gc faced a 63 percent greater risk of diabetes over a median follow-up of seven years, even after researchers adjusted for standard risk factors like exercise and overall diet.
The mechanism points to chronic inflammation as a concrete biological bridge between red meat and metabolic disease, though the observational nature of the NutriNet-Santé data means we cannot yet claim a definitive cause-and-effect link. The risk estimate did weaken somewhat after factoring in body mass index, suggesting weight remains deeply intertwined with the process. We still need direct measurements of immune response levels in humans to know precisely what threshold of consumption triggers this inflammatory cascade.
more: https://www.sciencedaily.com/releases/2026/10/261017230031.htm
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