If you lack the energy to get through your day, chances are your health and vitality are at risk, Dr. Woodson Merrell says. Dr. Oz talks with Dr. Merrell, author of The Source: Unleash Your Natural Energy, Power Up Your Health, and Feel 10 Years Younger , about ways you can become an "energy creator" rather than an "energy consumer" and create a healthier lifestyle in the process.

4 ways to boost your energy levels