Naomi Whittel is the author of a new book called "Glow15: A Science Based Plan to Lose Weight, Revitalize Your Skin, and Invigorate Your Life," which uses science-backed discoveries to jump start healthy living. She sits down with Alyssa Julya Smith in Los Angeles to share some of her findings and introduce people to the concept of "autophagy."

She describes autophagy as a little 'Pac-Man' inside your cells that cleans up junk and removes it. She says that's why the whole process works in 15 days. She explains that intermittent fasting is what activates this process in the body, and allows your cells to work with you to become healthier and look younger.

Whittel has traveled all over the world and visited different cultures to understand how other countries are implementing strategies for health and wellness. She learned about autophagy from Italy, and tells us how the science behind the concept was a Nobel prize-winner.