Size matters when it comes to buying clothes, but what if the size on the tag is a lie? We have the skinny on vanity sizing: Are retailers pulling a fast one by making you think you’re smaller than you really are? Then, if your back is killing you, try these strategies from the back pain duo to alleviate the ache for good. Plus, Dr. Oz investigates ancient grains for energy.

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.