Bad news for lovers of Boo Berry, Fruity Pebbles, and Kellogg's Frosted Flakes. Turns out they're not so "Grrrrreat!" after all.  Dr. Charles Platkin and DietDetective.com evaluated 301 cereals, and assigned each one a health score based on 19 different nutritional factors.

Here are the top-10 healthiest cereals:

1. Nature's Path Organic Millet Puffs
2. Barbara's Shredded Wheat
3. Kashi Whole Wheat Biscuits Autumn Wheat (Tied for 3rd place)
3. Quaker Oats Old Fashioned (Tied for 3rd place)
5. Nature's Path Oatmeal Gluten Free Selections Homestyle
6. Kashi 7 Whole Grain Cereals Puffs
7. Post Shredded Wheat Original Spoon Size
8. Nature's Path Qi'a Superfood Chia, Buckwheat & Hemp Original Flavor
9. Post Shredded Wheat Spoon Size Wheat'n Bran
10. Nature's Path Original Hot Oatmeal

These 10 cereals are the unhealthiest:  (Lowest ranked cereals first)

1. General Mills Monsters Boo Berry (Tied for last place)
1. Kellogg’s Rice Krispies Treats (Tied for last place)
1. Post Fruity Pebbles (Tied for last place)
1. Post Summer Berry Pebbles (Tied for last place)
1. General Mills Chocolate Lucky Charms (Tied for last place)
6. Kellogg’s Rice Krispies Cocoa Krispies
7. General Mills Cinnamon Toast Crunch Frosted Toast Crunch
8. Kellogg’s Frosted Flakes
9. Quaker Honey Graham Oh's
10. Kellogg’s Granola Low-fat Granola Multigrain with Raisins

For the complete list, and to see the criteria used to rank the cereals, click here.

- George McIntyre
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