A single serving of Kellogg's Froot Loops cereal clocks in at one and one-third cups, weighs 39 grams, and contains 150 calories, according to the nutrition facts printed on the side of the box.

Froot Loops will keep their artificially brightened colors. Some Pop-Tarts will lose them. Welcome to the ongoing experiment that is the American breakfast. The two companies formed after Battle Creek ...