Weight loss advice has long been about counting calories, but a new, large, expensive ($8 million) study led by Stanford Prevention Research Center throws that wisdom into serious doubt: it’s diet quality (cutting back on sugar, refined grains and highly processed foods, while focusing on vegetables and whole foods) that led to people losing significant amounts of weight over the course of a year – with no worrying about portion size or whether it was a low-fat or low-carb diet.
