Dementia risk increases with latitude (less vitamin D)
Sweden Dementia Twin Females
Geographical Variation in Dementia March 2015 - behind paywall
United Kingdom - Dementia
ITVNews Jan 2013
Green = higher risk, not red!!
United States - Parkinson's Disease
Nature 2013
Europe - Parkinson's Disease
https://www.23andme.com/about/factoids/23andMe
See also Vitamin D Life
Search Vitamin D Life for LATITUDE 703 items as of Nov 2019 (excluding PDFs)
Hip fracture rate varies with latitude (and thus vitamin D) in Sweden – Nov 2013
Chance of Dementia increased 3 percent for every 1 ng less of vitamin D – Feb 2015
Cognitive category overview with associated searches