
Blood Type B Linked to Modest Increase in Type 2 Diabetes Risk, Study Finds
A 2024 umbrella review of 51 meta-analyses (covering about 270 blood-group–health links) finds only one robust association: blood type B has about a 28% higher risk of type 2 diabetes than non-B types; the effect is modest and far smaller than risk factors like diet, obesity, or inactivity, and researchers call for more rigorous work and study of potential mechanisms such as the gut microbiome; published in BMC Medicine.











