Could gut bacteria reveal a hidden cause of diabetes? Study finds specific microbes linked to pancreatic damage.

When diabetes is caused by a damaged pancreas, it's not just about insulin. A new study looked at the gut bacteria of people with this type of diabetes, called type 3c, and compared them to people with type 1 diabetes and healthy people. They found the gut's bacterial community in type 3c diabetes is less diverse and has a distinct makeup. Specifically, two families of bacteria—Escherichia-Shigella and Streptococcus—were more common. Using a statistical model, the researchers could tell the difference between type 3c and type 1 diabetes with good accuracy based on the levels of five key bacteria. Their analysis suggests these bacterial changes are primarily linked to the pancreas not producing enough digestive enzymes, a condition called exocrine pancreatic insufficiency. This means the gut microbiome shifts in this form of diabetes seem to be driven more by the direct effects of the damaged pancreas on digestion, rather than by the general metabolic disturbances of diabetes itself.