Kellogg’s Froot Loops landed a spot in the Terrible 10 for representing the detrimental effects of sugary cereal on American health. Loaded with synthetic dyes, these fruit-free, super saccharine rainbow-colored circles of cereal entice kids to eat but fail to provide substantial nutrients. “If you start your day with just sugar, your going to be hungry a lot sooner than if you start your day with a higher fiber cereal,” says Keri Gans, RD, and author of The Small Change Diet.