Canadian food labels carry recommended limits for fat and salt but not sugar, and journalist Gillian Findlay wants to know why. For the fifth estate's season premiere, she talks to the small group of medical researchers linking sugar to obesity, cancer, heart disease and Alzheimer's, and to the critics who push back on their claims. The episode puts a family of four on a sugar-reduction diet and tracks what changes, while food industry representatives get pressed on why ingredient labels make it so hard to see how much sugar is actually in a product. Findlay's reporting treats the science as contested rather than settled, giving both the researchers raising alarms and their skeptics room to make their case. The episode aired October 4, 2013, as the season opener, and builds its argument around a simple comparison: fat and salt got regulatory attention decades ago, and sugar, despite emerging research, still has not.