American cardiologists concluded that if you actually care of your health and namely memory function, you should limit the consumption of hamburgers.
It has been found out long ago that trans fatty acids affect the brain activity.
Actually, this type of fatty acids is formed during hydrogenation and baking in food industry.
Fast food, bakery, confectionery and fried food contain plenty of trans fats. According the research of American Heart Association, trans fat causes great harm to the human brain namely the grey matter.