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What is healthy when it comes to food? That's a question that many people struggle to answer on a daily basis around the world. How much sugar, fat, carbs, and salt our bodies need has been the topic of debate for, well, pretty much forever, and constantly-shifting nutritional guidelines aren't making things any easier to understand. 什么样的食品才算是健康食品？世界各地每天都有人受这一问题的困扰。身体所需的糖分、脂肪、碳水化合物和盐含量一直以来都是争论的焦点，而不断变化的营养指南并没有让事情变得简单。 Calories are, of course, the biggest factor in how much weight a person loses or gains, but how we get those calories can vary dramatically from person to person. Now, a new study suggests that eating so-called "ultra-processed" foods may be fueling the obesity epidemic and contributing to overeating. 当然，卡路里是一个人增重或减重的最大因素，但获取卡路里的方式却因人而异。现在，一项新研究表明，食用所谓的"过度加工"食物可能会加剧肥胖症，导致暴饮暴食。 The study, which was published in Cell Metabolism, focused on the eating habits of a group of 20 volunteers who agreed to follow specific eating guidelines for two weeks. The subjects selected for the study were considered "weight-stable," meaning they had been maintaining their weight without any dramatic fluctuation. | 
