Smokers

Researchers analyzed the data of 23,123 health plan members who participated in a voluntary exam and health behavior survey from 1978 to 1985, when they were 50 to 60 years old. Twenty-three years later, about one-quarter of the group, or 5,367, had dementia, including 1,136 with Alzheimer’s disease and 416 with vascular dementia.

Read more at:

 http://planetgreen.discovery.com/food-health/smokers-37-percent-more-likely-to-get-dementia-and-increased-risk-of-alzheimers-disease-later-in-lif.html