From plant extracts to fish oils to yogurt laden with beneficial bacteria, food designed to make us brainier as well as physically healthier is growing in popularity. This program examines the trend, which has created a windfall for retailers and manufacturers even though the jury is still out regarding the benefits for consumers. Viewers learn about the history of health-food claims and meet food marketing expert David Hughes, who predicts that low fat and reduced sugar will no longer sustain the health-food trade. Instead, Hughes asserts, remedies for specific health and wellness problems will drive culinary commerce. Consumer advocate Michelle Smyth, however, warns against touting products like probiotics and Omega 3 oils as brain strengtheners without scientific evidence.