M&Ms seem relatively harmless.
They're just little disks of chocolate encased in a sugary shell.
But one serving of M&Ms contains 30 grams of sugar and 30 percent of your daily saturated fat.
Not only that, M&Ms get their distinctive bright hues from artificial dyes.
A growing amount of research shows that artificial dyes might negatively affect a child's behavior.
The Peanut Butter M&Ms are honestly a slightly better option, offering 8 fewer grams of sugar yet two more grams protein.