Some parents are petitioning some of America's most iconic brands to change their colors, which they say are making their kids hyperactive, CNN's Senior Medical Correspondent Elizabeth Cohen reports.
The problem seems to be where you get your products.
"Yellow 6, " "Yellow 5, ""Red 40," – all names for artificial food coloring derived from petroleum.
But in England, M&Ms get their coloring mostly from plants.
Renee Shutters is a mom who says her son Trenton used to suffer regular 'meltdowns' but then his behavior improved remarkably when she took artificial dyes out of his diet.
Now she's building support for her cause.
More than 140,000 people have signed her change.org petition, calling on the candy company Mars to remove artificial food coloring from M&Ms.
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