The HHS secretary has pressured food companies like Mars, which makes M&M's, to stop using artificial dyes. Easier said than done.
This episode was produced by Hady Mawajdeh, edited by Jolie Myers, fact-checked by Gabriel Dunatov, engineered by David Tatasciore and Bridger Dunnagan, and hosted by Noel King.
A close-up image shows a bowl of blue M&M candies. Photo by Peter Macdiarmid/Getty Images.
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