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HOUSTON -- Is there a link between food dye and neurological behaviors like ADHD? A change of diet changed one little boy s life, and his mom thinks food coloring was to blame.

In all, we have nine different artificial dyes approved for use in the U.S., and they re widely used despite the fact many people think they re unnecessary and harmful. They re at the top of their game now, but once were labeled unfocused, unruly, and hyper.

No one knows what causes Attention Deficit-Hyperactivity Disorder, or ADHD, but more than five million kids have it.

Christian Sleipnes was diagnosed when he was four. When his mom read about the link between ADHD and food dyes, she changed his diet. Christian has been dye-free for months and his mom has noticed he s more focused and less distracted.

Watch Mia s full report above.

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