Research has shown there is proven link between high blood sugar and dementia. It is not suggesting that anyone with dementia has high blood sugar. Interestingly, the Alzheimer's Society is promoting the trial of diabetes drug
Liraglutide to help treat Alzheimers.
See
https://www.alzheimers.org.uk/news/...lood_sugar_and_alzheimer_s_disease_identified
Researchers at University of Bath compared brain samples of 30 people with and without Alzheimer’s disease and tested them for protein glycation, a modification caused by high glucose levels in the blood.
The team found that a particular enzyme was glycated in the brains of people with Alzheimer’s disease and that glycation stopped the enzyme from working properly. The enzyme, known as ‘macrophage migration inhibitory factor’ or MIF, has been previously implicated in the inflammatory response that occurs in the brains of people with Alzheimer’s disease.