这项研究在《细胞代谢》杂志上发表,关注20位志愿者的饮食习惯。这些志愿者同意连续两周遵循特定的饮食指南。研究员认为这些受试者"体重稳定,"也就是说他们的体重处于几乎持平状态,没有太大波动。
The group was randomly split into two groups, with one group eating a diet of uNPRocessed foods and the other eating the oh-so-convenient ultra-processed foods, or "junk food," as we often think of it.
20位受试者被随机分成2组,一组食用未加工食品,另一组食用方便过度加工食品,或我们俗称的"垃圾食品"。
"During each diet phase, the subjects were presented with three daily meals and were instructed to consume as much or as little as desired," the researchers write. "Up to 60 min was allotted to consume each meal. Menus rotated on a 7-day schedule, and the meals were designed to be well matched across diets for total calories, energy density, macronutrients, fiber, sugars, and sodium, but widely differing in the percentage of calories derived from ultra-processed versus uNPRocessed foods."
"在每一饮食阶段,受试者都是一日三餐,可根据自己的喜好多吃或少吃,"研究员写道。"每次用餐时间最多为60分钟。每隔7天会重复菜品,膳食的设计满足了人体所需的卡路里、能量密度、常量营养素、纤维、糖和钠,但过度加工食品和未加工食品的卡路里比例相差甚大。"
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