“Q: Is their life span shorter, hence less chance of occurence of Alzheimers?”
Not really, they just have a higher infant mortality rate. The Bible promises 3 score and 10 (70), and if you can make beyond infancy, most people will reach it. On the other hand, living 70 years in India might not be all that fun. Wearing diapers your whole life and eating curry at every meal might get tiresome.
“Wearing diapers your whole life and eating curry at every meal might get tiresome.”
Is curry known for having that effect on people?