Rolls Barbara J, Roe Liane S, Kral Tanja V E, Meengs Jennifer S, Wall Denise E
Department of Nutritional Sciences, The Pennsylvania State University, 226 Henderson Building, University Park, PA 16802-6502, USA.
Appetite. 2004 Feb;42(1):63-9. doi: 10.1016/S0195-6663(03)00117-X.
The objective of this study was to determine how the portion size of a packaged snack affects energy intake of the snack and of the subsequent meal. On five separate days, 60 subjects (34 women and 26 men) ate an afternoon snack and dinner in individual cubicles. For each snack, subjects were served one of five packages of potato chips (28, 42, 85, 128, or 170 g), which they consumed ad libitum directly from the unlabelled, opaque package. Subjects returned to the lab three hours later for a standard dinner, which was also consumed ad libitum. Results showed that snack intake increased significantly as the package size increased for both males and females (p < 0.001). The combined energy intake from snack and dinner also increased as the package size increased. On average, when served the largest snack package compared to the smallest, subjects consumed an additional 596 kJ (143 kcal) at snack and dinner combined. Results from this study demonstrate that short-term energy intake increases with increasing package size of a snack. These data suggest that the availability of large packages of energy-dense snacks may be one of the environmental influences associated with excess energy intake.
本研究的目的是确定包装零食的份量如何影响该零食以及后续正餐的能量摄入。在五个不同的日子里，60名受试者（34名女性和26名男性）在单独的小隔间里食用一份下午点心和晚餐。对于每份点心，给受试者提供五种包装薯片（28克、42克、85克、128克或170克）中的一种，他们直接从无标签的不透明包装中随意食用。三小时后，受试者回到实验室吃一顿标准晚餐，同样可随意进食。结果显示，男性和女性的零食摄入量均随包装尺寸的增大而显著增加（p<0.001）。零食和晚餐的总能量摄入也随包装尺寸的增大而增加。平均而言，与最小包装的零食相比，当提供最大包装的零食时，受试者在零食和晚餐中的总摄入量额外增加了596千焦（143千卡）。这项研究的结果表明，短期能量摄入会随着零食包装尺寸的增大而增加。这些数据表明，大包装的高能量密度零食的可得性可能是与能量摄入过多相关的环境影响因素之一。
