Hundreds of people gathered outside the WK Kellogg headquarters in Michigan on Tuesday calling for the company to hold up its promise to remove artificial dyes from its breakfast cereals sold in the U.S. Nearly 10 years ago, Kellogg's, the maker of Froot Loops and Apple Jacks, committed to removing such additives from its products by 2018. While Kellogg's has done so in other countries including Canada, which now makes Froot Loops with natural fruit juice concentrates, the cereals sold in the U.S. still contain both food dyes and a chemical preservative. In the U.S., Froot Loops ingredients include Red Dye No. 40, Yellow Dye No. 5, Yellow Dye No. 6 and Blue Dye No. 1. Kellogg's insisted its products are safe for consumption, saying its ingredients meet the federal standards set by the U.S. Food and Drug Administration.The agency has said that most children experience no adverse effects from color additives, but critics argue the FDA standards were developed without any assessment for possible neurological effects. The protests come in the wake of a new California law known as the California School Food Safety Act that bans six potentially harmful dyes in foods served in California public schools. The ban includes all of the dyes in Froot Loops, plus Blue Dye No. 2 and Green Dye No. 3. Consumption of said dyes ... may be linked to hyperactivity and other neurobehavioral problems in some children.