I mentioned yesterday that whenever something comes out saying that “everything you thought you knew about nutrition is wrong,” it’s a sign that some skepticism may be in order. Here is another example: The article on the “sugar conspiracy“ by Ian Leslie published in The Guardian.  This strongly criticizes the work of Ancel Keys, whose work was largely but by no means exclusively responsible for the diet-heart hypothesis linking excessive intake of animal fats to heart disease risk. I love conspiracy theories as much as anyone else and appreciated how the author made his case for this one.  My sense of his article was that it had grains of truth (Gary Taubes and Cristin Kearns, for example, report that Keys had funding from …