What organ of your body is a secret weapon in the fight against fatigue? Find out how to care for these organs -- and boost your energy naturally!

Learn how to get your best sleep and ensure you stay bright-eyed all day long. Click here to take Dr. Oz's Sleep Quiz. 

Animation produced by Visible Productions Inc.

Want to know how to look marvelous without splurging so much? Dr. Oz invites three beauty experts to share the smartest ways to save money while looking fabulous starting from your hair and makeup tools to the beauty products you use.