Once dubbed junk, certain snacks are enjoying a second life as so-called “functional foods”—candy bars or sugary cereals spruced up with added nutrients, the AP reports. Despite warnings by health experts, functional foods now account for $27 billion in sales, or 5% of the US food market, and experts say that share will grow. But "functional foods are about marketing, not health," says one scientist.
Still, who can resist a candy bar with vitamin B or ice cream with calcium? General Mills Health Fiber One bars, some flavored with caramel or chocolate—and boosted with fiber—topped the $100-million sales mark in 2007. Health advocates worry about Americans growing ever fatter: "The biggest problem we have in the United States is overnutrition—too much calories," one says.