Why do some people age gracefully, showing only minor and at worst, frustrating cognitive changes, while others show a more severe and disabling memory decline such as that seen in Alzheimer’s disease?

Today, as part of the Limerick Lifelong Festival, I gave a talk on the factors that trigger Alzheimer’s and described  how diet and exercise can help to prevent the disease and promote quality of life.  I will be writing more on this topic in the coming days.