感知到的热量和营养摄入量是否会影响饮料消费对心血管功能的急性影响?
Ellen C McGarity-Shipley1, Melanie E Vitez1, Evan D Curd1
1Cardiovascular Stress Response Laboratory, School of Kinesiology and Health Studies, Queen's University, Kingston, Ontario, Canada.
饮用高脂肪/高糖饮料只在被标记为不健康时,才会损害内皮功能. 这表明感知到的营养信息,而不仅仅是饮料本身,影响心血管健康,可能涉及nocebo效应.
科学领域:
- 心血管生理学心血管生理学
- 营养科学 营养科学
- 心理神经免疫学 心理神经免疫学
背景情况:
- 对于心血管健康至关重要的内皮功能,可以被饮食摄入严重影响.
- 对食物的心理感知,包括其营养标签,可能会影响生理反应.
- 以前的研究还没有检查饮料的健康感受如何影响内皮功能.
研究的目的:
- 为了调查相同的高脂肪/高糖饮料是否会根据其感知到的健康性 (标记为不健康与健康) 对内皮功能产生不同的影响.
- 探索感知到的营养信息和潜在的nocebo效应对心血管反应的作用.
主要方法:
- 25名健康的年轻女性参与了三个条件:饮用含有准确"不健康"营养信息的牛奶,含有不准确"健康"信息的相同牛奶,以及水 (控制).
- 在饮料消费前后使用臂动脉流媒扩张 (FMD) 评估内皮功能.
- 血液标记物 (葡萄糖,胰岛素,甘油三) 和口服液皮质醇被测量;感知到的健康,伤害,羞耻和压力也被评估.
主要成果:
- 在食用被标记为"不健康"的奶昔后,内皮功能 (FMD) 显著下降,但在被标记为"健康"时或饮用水后,并没有显著下降.
- 在两种牛奶条件下,葡萄糖,甘油三和胰岛素水平都增加了,但口炎的减少是特定于"不健康"标签的.
- 饮料的感知健康度较低与口和口腔炎的更大减少有显著的相关性.
结论:
- 高脂肪/高糖奶昔只会在参与者认为它不健康时降低内皮功能,这表明营养标签会影响生理结果.
- 这些发现表明,对营养信息的看法在食物摄入对内皮功能影响中起着作用.
- 结果表明,nocebo效应可能与心血管疾病的病因有关.
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