I just looked at a map of countries with the lowest dementia rates and I don't think any of them, including countries like India, North Korea, Somalia and Thailand, are known for eating Paleo diets, so I would also question the Perlmutter conclusions. Many of the countries on the bottom of the list would likely have ethnic peasant kind of diets. So I could see eating less processed foods as a factor since most of the low incidence countries also tend to be less developed.
Here is the map:
ALZHEIMERS/DEMENTIA DEATH RATE BY COUNTRY
We have a neighbor we would run into walking our dogs, and he started introducing himself to us every time we saw him, which was 2 -3 times a week.
I don't expect the countries in Grey to have high Alzheimer's rates. The lifespan is fairly short in comparison to wealthier countries. In fact, most of the countries with high rates are wealthier.
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