J Acad Nutr Diet. 2020 Feb;120(2):197-209. doi: 10.1016/j.jand.2019.10.008.
This study assessed the effects of the new Nutrition Facts label (NFL) compared with the current NFL on consumer purchase intentions and understanding of added sugars, and differences by educational attainment.
Randomized controlled online experiment.
PARTICIPANTS/SETTING: Final study sample of 1,156 US adults, oversampling participants with low education.
All participants were exposed to a control condition (images of bread, 100% juice, yogurt, and canned fruit with no NFL) and then randomized to one of two label conditions: the current NFL with information on total sugars only or the new NFL with information on added sugars. Participants responded to the same set of questions in the control and the label conditions while viewing products that displayed one of the two NFLs.
Differences in scores averaged across all products for understanding of added sugars (proportion of correctly answered multiple-choice questions) and purchase intentions (5-point Likert scale ranging from extremely likely to extremely unlikely).
One-way analysis of variance was used to test for differences between NFLs.
Compared with the current NFL, participants in the new NFL arm had better understanding of added sugars content (P<0.01). Although no significant differences were seen for purchase intentions overall, there were differences for individual products. Participants in the new NFL arm were more likely to purchase the juice (P<0.01) and less likely to buy the bread (P<0.01) compared with participants in the current NFL arm. There were no differences by educational attainment.
Participants were better able to locate and extract added sugars information when viewing the new NFL compared with the current NFL. The new NFL may increase intent to purchase products low in added sugars but high in refined carbohydrates-an unintended consequence that warrants further study.
本研究评估了新营养成分标签（NFL）与现行 NFL 对消费者购买意愿和对添加糖理解的影响，并比较了不同教育程度之间的差异。
随机对照在线实验。
参与者/设置：最终研究样本为 1156 名美国成年人，对教育程度较低的参与者进行了抽样。
所有参与者都接触到了一个对照条件（面包、100%果汁、酸奶和罐装水果的图片，没有 NFL），然后随机分配到两种标签条件之一：仅显示总糖信息的现行 NFL 或显示添加糖信息的新 NFL。在查看显示两种 NFL 之一的产品的同时，参与者对控制和标签条件下的同一组问题做出了回应。
对添加糖理解（多项选择题正确回答的比例）和购买意愿（5 分李克特量表，从极有可能到极不可能）的平均得分差异。
单向方差分析用于测试 NFL 之间的差异。
与现行 NFL 相比，新 NFL 组的参与者对添加糖含量的理解更好（P<0.01）。尽管总体购买意愿没有显著差异，但个别产品存在差异。与现行 NFL 组相比，新 NFL 组更有可能购买果汁（P<0.01），不太可能购买面包（P<0.01）。教育程度没有差异。
与现行 NFL 相比，参与者在查看新 NFL 时更能定位和提取添加糖信息。新 NFL 可能会增加购买低添加糖但高精制碳水化合物产品的意愿——这是一个需要进一步研究的意外后果。
