Could you be suffering from a gluten allergy and not know it? Dr. Oz sits down with Dr. Neal Barnard to discuss why gluten can be harmful to your health. Learn why going gluten-free could help your health, and how to do it the right way! In this sneak peek Dr. Oz explains what gluten is and where it can be found.

Fat Substitutes: Could They Be Leading to Your Weight Gain?

They're hiding in everything from low-fat cottage cheese to protein shakes.

Fat substitutes are compounds that resemble the chemical and physical properties of certain fats and oils and are often used to replace conventional fats (butter, oil) in baking and frying. They can help bring calorie counts down.

But fat substitutes are almost like secret ingredients that hide in plain sight, says Mark Schatzker, author of the upcoming book "The End of Craving: Recovering the Lost Wisdom of Eating Well."

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