Abstract Background The perception that a food is ‘healthy’ or ‘low fat’ has been proposed as an important issue influencing eating behaviour. This study had two aims: a) to test the perceived health value of two popular foods in Brazil and, b) to investigate the impact of consuming these foods on subsequent food reward. Individual differences in adiposity and eating behaviour traits were also explored. Methods Twenty-four adults (36.9 ± 9.8 years) were included (10 male, 14 female), mean Body Mass Index 27.6 ± 4.1 kg/m2 and mean weight 77.4 ± 14.8 kg. They attended the laboratory on two different occasions, for Perceived high-Fat [PHF] and perceived Low-Fat [PLF] conditions. Food reward was tested by the LFPQ-BR in fasted and fed states for each condition. Two popular food in Brazil were chosen to be used as test meals and were prepared in order to be similar in terms of weight, calorie content and macronutrient composition; it was hypothesised that Coxinha [shredded chicken meat, covered in dough] (PHF condition) would be perceived as less healthy and higher fat content than a chicken sandwich (PLF condition). A paper-based visual analogue scale was used to confirm this hypothesis. Anthropometric measures (weight, height, neck and waist circumference) and eating behaviour traits scores (uncontrolled eating, cognitive restraint and emotional eating – TFEQ-R21) were undertaken. Results Results showed that the two nutritionally matched foods differed on several indicators of perceived healthiness including perceived fat content. Post consumption, there was an increased implicit wanting for high-fat sweet food after the PLF meal. Exploratory analyses showed that cognitive restraint was an independent predictor for the perception of the fat content of PHF and moderated the impact of PHF on implicit wanting. Conclusion These findings have implications for food marketing and the role of restrained eating on food perception and food reward.

中文翻译：

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食用脂肪含量高或低的食物对后续食物奖励的不同影响

摘要背景食物“健康”或“低脂肪”的看法已被提出作为影响饮食行为的重要问题。这项研究有两个目的：a) 测试巴西两种流行食物的感知健康价值，b) 调查食用这些食物对后续食物奖励的影响。还探讨了肥胖和饮食行为特征的个体差异。方法 包括 24 名成人（36.9 ± 9.8 岁）（10 名男性，14 名女性），平均体重指数 27.6 ± 4.1 kg/m2 和平均体重 77.4 ± 14.8 kg。他们在两个不同的场合参加了实验室，分别是感知高脂肪 [PHF] 和感知低脂肪 [PLF] 条件。LFPQ-BR 在禁食和进食状态下针对每种情况测试了食物奖励。选择了两种在巴西流行的食物作为测试餐，并在重量、卡路里含量和常量营养素组成方面进行了准备；据推测，与鸡肉三明治（PLF 条件）相比，Coxinha [鸡肉丝，裹在面团中]（PHF 条件）会被认为不那么健康且脂肪含量更高。使用基于纸张的视觉模拟量表来证实这一假设。进行了人体测量（体重、身高、颈部和腰围）和饮食行为特征评分（不受控制的饮食、认知限制和情绪化饮食 - TFEQ-R21）。结果 结果表明，两种营养匹配的食物在感知健康的几个指标上存在差异，包括感知的脂肪含量。消费后，在 PLF 餐后，对高脂肪甜食的隐性需求增加。探索性分析表明，认知约束是对 PHF 脂肪含量感知的独立预测因子，并缓和 PHF 对内隐需求的影响。结论这些发现对食品营销和节制饮食对食物感知和食物奖励的作用具有影响。