Neuropsychologists at the French National Institute of Medical Research studied 1,433 older adults in their 70s from southern France. The researchers asked participants about their lifestyle, medical history and educational background, and had them complete a reading test. The results showed that the amount of mental training played a significant role in the likelihood of developing Alzheimer’s disease. Older adults with low reading test scores had an 18 percent increased incidence of Alzheimer’s disease; depression led to a 10 percent increased risk of Alzheimer’s disease; people who ate fruits and vegetables less than twice a day had a 6.5 percent increased risk of Alzheimer’s disease; and diabetes increased the risk of Alzheimer’s disease by 5 percent. Neuropsychologists say that the best way to prevent Alzheimer’s disease is to keep the brain active, keep the mood down and eat a healthy diet with plenty of vegetables and fruits. If young people could master this, there would be millions fewer cases of Alzheimer’s worldwide.