Flat irons, relaxers and the controversial Brazilian blowout. Dr. Oz reveals the shocking truth behind these treatments. Plus, learn how you can stay safe without sacrificing the look.

How safe are your cosmetics? Click here to take the quiz.

Click here to watch Part 2.

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.