One of my clients sent me this link to a very recent Times article. In case it's news to anyone, I thought I might share it, along with some notes.
Basically, these data gatherers found that the overall lower your blood sugar trends, the smarter you'll be and the more protected your brain will be forever. It's not news. There have been a number of studies finding that insulin resistance, thus neural cell death, occurs 10-20 years before you have any fasting sugars or A1c reading that trend high. By the time you have a diagnosis of Alzheimer's or dementia your were pulling fasting blood sugars in the high 90s and low 100s for 30 years and never did anything about it because you weren't diagnosed with diabetes. Sugar and insulin cross the blood brain barrier and contribute to dysfunction of receptors within the cells of your central nervous system.
A fat burning metabolism, insulin sensitivity and controlled carbohydrate intake are absolutely essential to living the best life you can.