Fatigue might be caused by these four often overlooked health conditions.

Always tired? Sara Reistad-Long finds the cure.

In a remote corner of Brazil, the man known as John of God is changing people's lives in astonishing ways. Can belief cure illness? Can energy heal? Susan Casey took the journey to find out.

If you want to boost your mood, strengthen your immune system, sleep better, and look great, Bob Greene has one word for you: exercise. In an excerpt from his new book, The Life You Want: Get Motivated, Lose Weight, and Be Happy, Oprah's trainer helps you scrap the excuses for good.

Four energy boosters and three energy busters that will get you thinking.