Yes, there is, in fact, an urban legend involving the state of Michigan and McDonald’s and it’s for the weirdest reason. I was recently made aware that there was once a McDonald’s in Mackinaw City, which was one of three McDonald’s at the time that actually closed for the winter.
The flavor rainbow was the recent focus of a law that was passed in California when they decided to ban the use of the dye Red #3. California Food Safety Act actually banned the use of potassium bromate, propylparaben, potassium bromate, and red dye no. 3 which they say shows adverse health effects on those who consume them