Tanya Zuckerbrot wondered why some people can eat whatever they want until their heart's content while others see even the slightest dietary peccadilloes betrayed by their waistline.  Putting her masters-level training in nutrition to work, Tanya formulated the F-Factor diet which made fiber fabulous and turned Tanya into THE person fashionable New Yorkers go to when they seek to shed a few pounds.  In this episode of Beauty Bosses, Tanya Zuckerbrot talks to Dr. Lara Devgan about why perseverance is the key to success and happiness, and why life is too short to not have a bite (or three) of your favorite food.