While claiming that meat, dairy, and eggs are the cause of all illness in the world, What The Health gives a free pass to sugar. In fact, the film argues that sugar's been needlessly vilified to shift our attention from the true evil that is animal products. But sugar is fucking terrible for you, and has been linked to heart disease, diabetes, obesity, and cavities for a long time. If anyone has been trying to shift your attention, it's the sugar industry and its countless attempts to downplay sugar's negative effects.
With the aid of scary music and unqualified talking heads, What The Health pushed an "Eat all the sugar you want, but don't you dare smoke any eggs" diet, while arguing that doctors, the government, the American Cancer Society, and the American Diabetes Association are all complicit in covering up the ills of animal products for financial gain. It's essentially Loose Change for vegans, to the point that even regular vegans had to denounce its rambling bullshit. And when vegans are telling you to tone down the rhetoric, you know there's a problem.