Type 3 Diabetes: What is it? How is it connected to Alzheimer's?

There’s a difference in the popular definition of T3D and the scientific definition of T3D - I had this discussion with the endocrinologist who’s coauthoring my book. Most of us consider Type 3 Diabetes to be a situation where a T1D has developed T2D, but in the scientific community, Type 3 diabetes refers to a disorder of the brain in which activity of insulin and glucose uptake by brain cells is impaired. Aside from being a disorder of glucose metabolism, it is not (apparently) related to or a product of T1D, T2D, LADA, or anything combination thereof, at least not based on what is currently known now, which admittedly isn’t a lot. But she was telling me that they do think it plays a role in most cases of Alzheimer’s.