Let them eat fruit! The effect of fruit and vegetable consumption on psychological well-being in young adults: A randomized controlled trial
Let them eat fruit! The effect of fruit and vegetable consumption on psychological well-being in young adults: A randomized controlled trial
复制标题
DOI：
10.1371/journal.pone.0171206
复制
发表时间：
2017-02-03
期刊：
影响因子：
3.7
通讯作者：
Vissers, Margreet C. M.
中科院分区：
文献类型：
--
作者：
Conner, Tamlin S.;Brookie, Kate L.;Vissers, Margreet C. M.
这项研究测试了为期14天的预注册临床干预的心理益处，以增加171名低FV消费的年轻人（67%为女性，年龄18-25岁）的水果和蔬菜（FV）消费。参与者被随机分配到日常饮食控制条件，生态瞬时干预（EMI）条件，包括短信提醒增加他们的FV消费量加上购买FV的代金券，或水果和蔬菜干预（FVI）条件，其中参与者每天额外获得两份新鲜FV。自我报告结果测量是干预前后测量的抑郁症状和焦虑，以及每天使用智能手机调查评估的消极和积极情绪，活力，繁荣和繁荣行为（好奇心，创造力，动机）。维生素C和类胡萝卜素从血液样本测量干预前后，和心理预期FV的好处进行了测量干预后测试作为调解人的心理变化。只有FVI条件下的参与者表现出他们的心理健康改善，在14天内相对于其他组的活力，繁荣和动力增加。没有发现抑郁症状、焦虑或情绪的变化。干预的好处是不介导的维生素C，类胡萝卜素，或心理预期。我们的结论是，为年轻人提供高质量的FV，而不是提醒他们吃更多的FV（用代金券购买FV），导致他们的心理健康显着的短期改善。这些结果提供了初步的概念证明，即使在很短的时间内，给年轻人吃新鲜的水果和蔬菜也可以带来心理上的好处。
This study tested the psychological benefits of a 14-day preregistered clinical intervention to increase fruit and vegetable (FV) consumption in 171 low-FV-consuming young adults (67% female, aged 18-25). Participants were randomly assigned into a diet-as-usual control condition, an ecological momentary intervention (EMI) condition involving text message reminders to increase their FV consumption plus a voucher to purchase FV, or a fruit and vegetable intervention (FVI) condition in which participants were given two additional daily servings of fresh FV to consume on top of their normal diet. Self-report outcome measures were depressive symptoms and anxiety measured pre-and post-intervention, and daily negative and positive mood, vitality, flourishing, and flourishing behaviors (curiosity, creativity, motivation) assessed nightly using a smartphone survey. Vitamin C and carotenoids were measured from blood samples pre-and post-intervention, and psychological expectancies about the benefits of FV were measured post-intervention to test as mediators of psychological change. Only participants in the FVI condition showed improvements to their psychological well-being with increases in vitality, flourishing, and motivation across the 14-days relative to the other groups. No changes were found for depressive symptoms, anxiety, or mood. Intervention benefits were not mediated by vitamin C, carotenoids, or psychological expectancies. We conclude that providing young adults with high-quality FV, rather than reminding them to eat more FV (with a voucher to purchase FV), resulted in significant short-term improvements to their psychological well-being. These results provide initial proof-of-concept that giving young adults fresh fruit and vegetables to eat can have psychological benefits even over a brief period of time.