Alzheimer's already broken out? This means the disease can still be combated. Around 1.2 million people in Germany suffer from the neurodegenerative disease.

Certain risk factors such as age, genes and an unhealthy lifestyle can increase the likelihood of developing Alzheimer's. A healthy lifestyle can provide a cognitive reserve to maintain cognitive abilities independent of the usual pathological changes in the brain in dementia, according to the U.S. study. The results were published in the journal JAMA Neurology.