已提出并建议增加水果和蔬菜(FV)消费对面部吸引力的影响,作为促进FV摄入的策略。但迄今为止还没有研究证明FV消费和感知吸引力之间存在因果关系。这项研究调查了30名低FV消费者在监督消费2、5或8份FV之前和之后4周的吸引力感知。还研究了通过皮肤颜色和感知的皮肤健康而改变的潜在机制。
在控制条件下,在4周干预开始和结束时拍摄面部照片。随后,有73个独立个体按随机顺序对所有60张照片进行了评级,为了面部吸引力,面部皮肤发黄,发红,健康,清晰度,和对称性。
使用聚类多元回归,前4周的FV消费对吸引力没有直接影响,但是,对于女性面孔,发现了一些间接影响的证据,通过皮肤黄度的线性和非线性变化。效果大小,然而,很小。没有发现FV消耗和皮肤健康之间的关联,但是皮肤健康与面部吸引力有关。
4周内FV消耗的受控和客观测量的增加通过皮肤泛黄的增加间接导致女性的吸引力增加,但效果很小,随着FV消耗的增加而逐渐变细。根据这项研究的影响大小,我们不愿推荐使用面部吸引力来鼓励增加FV消耗.
临床试验登记号NCT01591057(www.clinicaltrials.gov)。注册日期:4月27日,2012.
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.