Research Centre for Behaviour Change, Department of Psychology, Bournemouth University, Poole House, Fern Barrow, Poole, BH12 5BB, UK.
Centre for Public Health, School of Medicine, Dentistry and Biomedical Sciences, Queen's University, Belfast, Grosvenor Road, Belfast, BT12 6BJ, UK.
BMC Public Health. 2018 Mar 1;18(1):298. doi: 10.1186/s12889-018-5202-6.
An effect of increased fruit and vegetable (FV) consumption on facial attractiveness has been proposed and recommended as a strategy to promote FV intakes, but no studies to date demonstrate a causal link between FV consumption and perceived attractiveness. This study investigated perceptions of attractiveness before and after the supervised consumption of 2, 5 or 8 FV portions/day for 4 weeks in 30 low FV consumers. Potential mechanisms for change via skin colour and perceived skin healthiness were also investigated.
Faces were photographed at the start and end of the 4 week intervention in controlled conditions. Seventy-three independent individuals subsequently rated all 60 photographs in a randomized order, for facial attractiveness, facial skin yellowness, redness, healthiness, clarity, and symmetry.
Using clustered multiple regression, FV consumption over the previous 4 weeks had no direct effect on attractiveness, but, for female faces, some evidence was found for an indirect impact, via linear and non-linear changes in skin yellowness. Effect sizes, however, were small. No association between FV consumption and skin healthiness was found, but skin healthiness was associated with facial attractiveness.
Controlled and objectively measured increases in FV consumption for 4 weeks resulted indirectly in increased attractiveness in females via increases in skin yellowness, but effects are small and gradually taper as FV consumption increases. Based on the effect sizes from this study, we are hesitant to recommend the use of facial attractiveness to encourage increased FV consumption.
Clinical trial Registration Number NCT01591057 ( www.clinicaltrials.gov ). Registered: 27th April, 2012.
有人提出并建议增加水果和蔬菜（FV）的摄入量会增加面部吸引力，以此作为促进 FV 摄入的策略，但迄今为止尚无研究证明 FV 摄入量与感知吸引力之间存在因果关系。本研究调查了 30 名低 FV 消费者在 4 周内每天监督摄入 2、5 或 8 份 FV 后，对吸引力的感知变化。还研究了通过皮肤颜色和感知皮肤健康来改变吸引力的潜在机制。
在受控条件下，在干预开始和结束时拍摄面部照片。73 名独立个体随后随机顺序对所有 60 张照片进行了 60 张照片的面部吸引力、面部皮肤黄度、红色、健康、清晰度和对称性的评价。
使用聚类多元回归，过去 4 周的 FV 摄入量对吸引力没有直接影响，但对于女性面孔，通过皮肤黄度的线性和非线性变化，发现了一些间接影响的证据。然而，效应大小很小。没有发现 FV 摄入量与皮肤健康之间的关联，但皮肤健康与面部吸引力有关。
在 4 周内控制和客观测量的 FV 摄入量的增加间接导致女性的吸引力增加，这是通过皮肤黄度的增加而产生的，但效果很小，并且随着 FV 摄入量的增加而逐渐减弱。基于本研究的效应大小，我们对使用面部吸引力来鼓励增加 FV 摄入量犹豫不决。
临床试验注册号 NCT01591057（www.clinicaltrials.gov）。注册日期：2012 年 4 月 27 日。
