Young Lisa R, Nestle Marion
Department of Nutrition and Food Studies, New York University, NY 10012-1172, USA.
J Am Diet Assoc. 2003 Feb;103(2):231-4. doi: 10.1053/jada.2003.50027.
The greater energy content of larger food portions could be contributing to the increasing prevalence of overweight. Prevention guidelines recommend "sensible" portion sizes but do not define them. The US Department of Agriculture (USDA) defines standard serving sizes for dietary guidance, and the Food and Drug Administration (FDA) defines standard servings for food labels. To use these standards in counseling, nutritionists must know the sizes of portions available in the marketplace. We determined marketplace portion sizes, identified changes in these sizes with time, and compared current marketplace portions with federal standards. Most marketplace portions exceed standard serving sizes by at least a factor of 2 and sometimes 8-fold. Portions have increased over time; those offered by fast-food chains, for example, often are 2 to 5 times larger than the original size. The discrepancy between marketplace portions and standard servings suggests the need for greater emphasis on the relationship of portion size to energy intake as a factor in weight maintenance.
较大份食物所含的更多能量可能是超重患病率上升的一个原因。预防指南建议采用“合理的”份量，但并未对其进行定义。美国农业部（USDA）为膳食指南定义了标准份量，而美国食品药品监督管理局（FDA）为食品标签定义了标准份量。为了在咨询中使用这些标准，营养学家必须了解市场上提供的份量大小。我们确定了市场上的份量大小，找出了这些份量随时间的变化，并将当前市场上的份量与联邦标准进行了比较。大多数市场上的份量至少比标准份量大一倍，有时甚至大八倍。份量随着时间的推移而增加；例如，快餐连锁店提供的份量通常比原来的大两到五倍。市场份量与标准份量之间的差异表明，需要更加强调份量大小与能量摄入之间的关系，将其作为维持体重的一个因素。
