March 7th is National Cereal Day & we're spilling all the secrets on our favorite cereals -- and some of them are shocking!

1. No nuts in Honey Nut Cheerios?

Honey Nut Cheerios' flavor actually comes from crushed up peach & apricot pits!

2. "They’re Grrrr-eat!"

The voice of “Tony the Tiger” is also the voice of "You're a Mean One Mr. Grinch."

3. Despite the color differences, all Froot Loops are the same flavor.

4. There is as much sugar in a serving of “Honey Smacks” cereal as there is in a Dunkin’ Donuts glazed donut.

5. The only original marshmallow from Lucky Charms is the heart shape. All the others were added later.