The major hallmarks of Alzheimer’s Disease—neurofibrillary tangles, amyloid plaques, and brain cell atrophy—can all be explained by insulin resistance. A staggering 80% of people with Alzheimer’s Disease have insulin resistance or full-blown type 2 diabetes. The connection between insulin resistance and Alzheimer’s Disease is now so firmly established that scientists have started referring to Alzheimer’s Disease as “Type 3 Diabetes.”
This does not mean that diabetes causes Alzheimer’s Disease—dementia can strike even if you don’t have diabetes. It’s more accurate to think of it this way: Insulin resistance of the body is type 2 diabetes; insulin resistance of the brain is type 3 diabetes. They are two separate diseases caused by the same underlying problem: insulin resistance.