When you spend all day inside, you're depriving yourself of the mood-boosting powers of the sun's rays. Dr. Oz explains why a daily 15-minute walk can improve your life.

Watch more 30 Days of Beauty tips.

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.