For many Americans, eating healthier will be a top New Year's resolution. One expert says we should start by eliminating gluten. Dr. David Perlmutter claims eating foods high in carbohydrates causes brain inflamation and can trigger neurological disorders like anxiety, depression, and ADHD. He revised and updated his best-selling 2013 book "Grain Brain: The Surprising Truth about Wheat, Carbs, and Sugar–Your Brain's Silent Killers." Perlmutter joins "CBS This Morning" to offer nutrition tips.


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