This time of year feels like a continuous feast. With pumpkin spice lattes and apple pie and holiday cookies at every turn, Americans are constantly confronted by sugar. More than half of the nation's people are trying to eat less sugar -- and some are trying to quit altogether. So why is it so hard to tame that sweet tooth? Jenny and Lindsey dig into the ingredients that keep us chomping long past our necessary caloric intake: sugar, salt and fat. Jacqueline Raposo, a food writer and host of the "Love Bites" podcast, talks about the challenges of her month-long pledge to abstain from sugar. New York University's Nutrition and Food Studies Professor Marion Nestle explains why certain tastes appeal. Bestselling author and New York Times investigative reporter Michael Moss and Bloomberg's Craig Giammona speak to the companies that rely on sugar, salt and fat to attract consumers and how Big Food and Big Soda are being forced to change tactics.