Recently there have been a growing awareness that high blood sugar – even if not diabetic – may be linked to various forms of Dementia including both Alzheimer’s Disease and Vascular Dementia.

This Article from The Atlantic discusses the possible linkage.

longitudinal study, published Thursday in the journal Diabetologia, followed 5,189 people over 10 years and found that people with high blood sugar had a faster rate of cognitive decline than those with normal blood sugar—whether or not their blood-sugar level technically made them diabetic. In other words, the higher the blood sugar, the faster the cognitive decline.

In a 2012 study, Roberts broke nearly 1,000 people down into four groups based on how much of their diet came from carbohydrates. The group that ate the most carbs had an 80 percent higher chance of developing mild cognitive impairment—a pit stop on the way to dementia—than those who ate the smallest amount of carbs.’

The whole issue of high blood sugar, pre-diabetes and diabetes have a multitude of effects on the brain. It may also lead to Vascular Dementia.

… [T]here are several theories out there to explain the connection between high blood sugar and dementia. Diabetes can also weaken the blood vessels, which increases the likelihood that you’ll have ministrokes in the brain, causing various forms of dementia. A high intake of simple sugars can make cells, including those in the brain, insulin resistant, which could cause the brain cells to die. 

I wonder – since Ketones are an alternate source of energy for the brain – will a Ketogenic diet help slow down Dementia?