It would be interesting to see the impact of a sedentary lifestyle with a diet high in processed sugars on the brain, especially the impact of repeated high/low blood sugar cycles.
I have a feeling the entire US population has become lab rats as we moved into the world of processed foods and universal car ownership.
The goal is for the entire population to be on medication....for life...
Apparently, sedentary lifestyle may not matter as much, as long as you get sufficient intake of Vitamin D...
Vitamin D Deficiency Linked to Diabetes, Metabolic Syndrome in Studies - FR, 2010 June 27