Low glycemic foods, chocolate, and food that has high levels of omega-3 fatty acids, magnesium, tryptophan, folate and other B vitamins, have all been studied to evaluate their impact on mood. Results vary from study to study, but there usually appears to be an association between these foods and improved mood. In this experiment, you will evaluate how a diet that is rich in these “mood-enhancing” foods affects the way people feel over several weeks.