Obesity, The Possible Cure For Dementia?

Interestingly enough, there has been a study recently that shows that dementia risk is associated with you BMI but not in the way you would think. A higher BMI decreases your risk where as a lower one increases it during your middle years. I read about this at I F&*@ing Love Science where the author posted links to support her article. One of which was a link to the The Lancet Diabetes and Endocrinology where they posted the study results.

What do you guys think of these developments?

 

According to what I have read, dementia is basically a diabetes that centers on the brain. If that is true; then a person's diet could play a large part in whether or not you develop dementia as you get older. Except for Type 1 diabetes, it can be controlled ( and possibly avoided altogether) by eating the right diet.
When you eat refined carbohydrates, then your body makes insulin, to keep your blood sugar from spiking. If it lowers the blood sugar, then you may feel hungry again, and eat more.
If you choose to eat refined carbs again, then this cycle will just keep on repeating itself, eventually leading to an insulin deficiency, and diabetes.
Since our brain functions on cholesterol; people who use statin-type drugs to lower their cholesterol are the ones especially at risk of developing Alzheimer's Disease, or other forms of dementia.
From what I have been able to determine, the best way to avoid both diabetes, and dementia, is to eat a diet based on unrefined carbs, protein, and good quality oils, such as olive oil or coconut oil. The Paleo diet seems to be a good plan to follow to accomplish this.