You can read more about the what Dr. Perlmutter, the neurologist I am referring to, has to say on this topic in his new book "Grain Brain."
Coming back to the article and his ideas, says anything with a high glycemic index -- not just wheat, but also rice and other grains considered trendy because they're supposed to be healthy like quinoa and amaranth -- should be off-limits. So what is the link between carbohydrate-rich grains and dementia? No surprise: it's inflammation.
"Over the last 40 years, people have become addicted to gluten, Perlmutter’s narrative goes. In combination with carbs, gluten’s influence on our diets explains why we get dementia—and every other common neurologic problem. 'Inflammation is the cornerstone of Alzheimer’s disease and Parkinson’s, multiple sclerosis — all of the neurodegenerative diseases are really predicated on inflammation. Who knew?'"