 On February 5, 2015 Hari launched a petition on her website asking General Mills and Kellogg's to remove the preservative butylated hydroxytoluene (BHT) from their cereals.The additive has been widely used in cereal packaging in the U.S. for many years.BHT has to be listed as an ingredient on food labels, and some consumer-protection advocates like the Environmental Working Group have advised people to avoid it when possible.