The US Federal Trade Commission (FTC) has warned advertisers not to make health claims they cannot substantiate following a case with Interstate Bakeries, the manufacturer behind Wonder Bread. Interstate Bakeries' Wonder Bread product is marketed on health benefits as well as taste and value. The group has long flaunted the role of the vitamins and minerals it contains in helping children grow strong, but the disputed claim argued that Wonder Bread contained added calcium that could improve children's brain function and memory.