It’s a very common complaint – It’s freezing in here! Do you find that you’re always cold? Dr. Oz explains why your thyroid plays an important role in temperature regulation.

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.