There any many foods that contain yellow #5 and yellow #6. Europe has forbidden many food artificial dyes. These dyes effect health and many people do not realize they are allergic to them.
"Today, tartrazine and other artificial food dyes require a special warning on food packages sold in the European Union. No such warning requirement exists in the United States, although tartrazine (or Yellow No. 5) is always identified on ingredients lists when used in packaged foods, for the sake of the estimated 1 in 10,000 people who suffer allergic reactions to the chemical" (Jun 22, 2012 | 2:24 PM ET | Luke Yoquinto, MyHealthNewsDaily Contributor).