Department of Food Science and Nutrition, University of Minnesota, St. Paul, MN 55108, USA.
Department of Psychology, University of Minnesota, USA.
Appetite. 2016 Jan 1;96:111-115. doi: 10.1016/j.appet.2015.09.001. Epub 2015 Sep 4.
Vegetable consumption in the United States is low despite the wealth of evidence that vegetables play an important role in reducing risk of various chronic diseases. Because eating patterns developed in childhood continue through adulthood, we need to form healthy eating habits in children. The objective of this study was to determine if offering vegetables before other meal components would increase the overall consumption of vegetables at school lunch. We served kindergarten through fifth-grade students a small portion (26-33 g) of a raw vegetable (red and yellow bell peppers) while they waited in line to receive the rest of their lunch meal. They then had the options to take more of the bell peppers, a different vegetable, or no vegetable from the lunch line. We measured the amount of each vegetable consumed by each child. Serving vegetables first greatly increased the number of students eating vegetables. On intervention days most of the vegetables consumed came from the vegetables-first portions. Total vegetable intake per student eating lunch was low because most students chose to not eat vegetables, but the intervention significantly increased this value. Serving vegetables first is a viable strategy to increase vegetable consumption in elementary schools. Long-term implementation of this strategy may have an important impact on healthy eating habits, vegetable consumption, and the health consequences of vegetable intake.
尽管有大量证据表明蔬菜在降低各种慢性病风险方面发挥着重要作用,但美国人的蔬菜摄入量仍然很低。由于儿童时期形成的饮食习惯会持续到成年期,因此我们需要在儿童时期养成健康的饮食习惯。本研究的目的是确定在提供其他餐食成分之前提供蔬菜是否会增加学校午餐中蔬菜的总体摄入量。我们让幼儿园到五年级的学生在排队领取其余午餐时,先吃一小份(26-33 克)生蔬菜(红、黄甜椒)。然后,他们可以从午餐线选择多吃甜椒、另一种蔬菜或不吃蔬菜。我们测量了每个孩子吃的每种蔬菜的数量。先供应蔬菜大大增加了吃蔬菜的学生人数。在干预日,大多数食用的蔬菜来自先供应的蔬菜部分。由于大多数学生选择不吃蔬菜,因此每个吃午餐的学生的蔬菜总摄入量都很低,但该干预措施显著提高了这一数值。先供应蔬菜是增加小学生蔬菜摄入量的可行策略。长期实施这一策略可能对健康饮食习惯、蔬菜摄入量以及蔬菜摄入对健康的影响产生重要影响。