How

 NY Times: How to Know if You Have a Genetic Risk for Alzheimer’s - Chris Hemsworth recently revealed that he’s predisposed to dementia. Here’s how to find out if you’re at risk — and what to do if you are. By Dana G. Smith

Studies show that tried and true healthy habits — exercise, eating well, limiting your alcohol intake, getting enough sleep, not smoking and being socially engaged — are key to fending off neurodegenerative disease.