Fructose, a sugar common in the western diet, can damage hundreds of brain genes in a way that could lead to a range of diseases — from diabetes to cardiovascular disease, and from Alzheimer’s to attention deficit hyperactivity disorder — warns a new study. However, the researchers discovered good news as well: An omega-3 fatty acid known as docosahexaenoic acid (DHA) seems to reverse the harmful changes produced by fructose. […]