A quick look and I see that it's not very common there at all. You have very different causes of mortality to western countries. Something we would have seen more maybe a hundred years ago or more. Hopefully as you get more western processed foods you don't also get the western chronic diseases.
Here's a link for a description of dementia. It's a complex disease that doesn't really have a quick explanation and has an array of symptoms.
https://www.nia.nih.gov/health/alzheimers-and-dementia/what-dementia-symptoms-types-and-diagnosis
I don't think we would get more western processed foods as it's more expensive than our native delicacies.
Thanks for the link.
You're better off without them and sticking with what nature provides. 😉
Thanks for the tip then