Yesterday was National Cereal Day - yes, there's a day for cereals. And in honor of the day, researchers put together a list of the top 10 most purchased cereal brands in the United States.

Some of the cereals on the list will surprise you.

Here they are:

1. Cheerios
2. Honey Nut Cheerios
3. Frosted Flakes
4. Honey Bunches Of Oats
5. Cinnamon Toast Crunch
6. Lucky Charms
7. Fruit Loops
8. Frosted Mini Wheats
9. Life
10. Fruity Pebbles

The invention of breakfast cereal was founded on the fact that the American diet of the mid 1800's was a poor one packed with protein, booze and caffeine. Cereal was considered a remedy – a sort of 19th-century health or wonder food for the ailing masses.

According to USA Today, "Cereal sales have sogged recently, with U.S. sales of hot and cold cereal of $10.5 billion in 2017 down 9 percent since 2012, according to research firm Mintel. Cold cereal, which accounts for 87 percent of sales, has fallen 11 percent. Still, about nine out of 10 Americans (86 percent) say they've had cold cereal in the last year, Mintel found." Research also suggested that, "More than two in five cereal eaters (43 percent) have it as a non-breakfast snack."

Among those dishing about cereal on Twitter was Houston Texans defensive end J.J. Watt, who tweeted that figuring out his five favorite cereals was "harder than trying to figure out the top 4 teams for the College Football Playoff."

What's your favorite cereal? And when was the last time you had some?