Texas Attorney General Ken Paxton is investigating WK Kellogg Co., a Michigan-based cereal company, for potentially violating consumer protection laws over artificial dyes in its cereals.

Synthetic dyes used to make brightly colored cereals, drinks and candies are coming under scrutiny in states across the country.

Dozens of people have rallied outside the Michigan headquarters of WK Kellogg Co. to demand that the company remove artificial dyes from their cereals in the U.S. The maker of Froot Loops and Apple Jacks announced nearly a decade ago that it would remove artificial colors and ingredients from its products by 2018.

Kellogg’s has released a limited-edition box for Michigan football fans to celebrate the team’s big win in Houston on Monday.

Kellogg’s has taken its to-go cereal concept to new heights.

Kellogg has joined GLAAD for an anti-bullying campaign with All Together cereal. (CNN) - Raisin Bran, Corn Flakes, Rice Krispies, Frosted Flakes, Froot Loops and Frosted Mini Wheats in the same box? The new concoction isn't just a kid's breakfast dream -- it's an anti-bullying campaign. All Together is available for a limited time in honor of Spirit Day, an anti-bullying campaign that has millions of people wear purple to stand up against bullying. Along with the cereal campaign, Kellogg's also pledged to donate $50,000 to GLAAD in support of the group's efforts.