Some breakfast cereals meant for kids contain more than 50 percent sugar, a recent study revealed.

That's more sugar than having a glazed donut in the morning.

The new study by Consumer Reports looked at more than 20 cereals and their nutritional content.

Only four rated very good overall.

Those were Cheerios, Kix, Life and Honey Nut Cheerios.

As for the worst sugar offenders, Kellogg's Corn Pops was number one followed by Honey Smacks and Post's Golden Crisp.

Many cereal makers say they are revising their recipes and high sugar cereals will no longer be marketed to kids after next year.