Robin Roberts reveals how the power of optimism and gratitude helped her not only beat breast cancer but another rare disease. Plus, are you addicted to artificial sweeteners? Dr. Oz has the plan for everyone to kick the habit.

Dr. Oz goes where he's never gone before. He's letting you eat fast-food and it's not what you expect. Learn which fast food meals you can eat under 500 calories while still enjoying the food you love.

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