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Int. Dairy J:每天一杯牛奶有益大脑功能

来源:中国科学报 2012-02-01 12:01

美国缅因大学研究人员的一项发现,每天饮用至少一杯牛奶,不仅可保证人体所需的关键营养,而且能改善大脑功能。

研究人员日前在《国际乳品期刊》(International Dairy Journal)上发表的报告说,牛奶或奶制品摄入量较高的成年人,在记忆及其他大脑功能测试中得分较高,他们在测试中“不及格”的比例仅为不饮或少饮牛奶者的五分之一。

研究人员对900多名23岁至98岁的成年人进行了8项大脑功能测试,并记录他们的牛奶消费习惯。他们发现,不管在哪个年龄段,每天至少喝一杯牛奶的人在测试中的得分均较高;得分最高的一部分人也包含在饮用牛奶最多的人群中。

排除生活方式、饮食习惯等可能影响大脑健康的因素后,多喝牛奶与大脑更健康之间仍存在关联。研究人员表示,牛奶中的某些营养成分可能直接影响大脑功能,不过仍需进一步确认多喝牛奶的益处。

美国卫生部门发布的2010版《美国人饮食指南》建议成年人每天饮用3杯低脂或脱脂牛奶。(生物谷 Bioon.com)

Relation between dairy food intake and cognitive function: The Maine-Syracuse Longitudinal Study

G.E. Crichton, M.F. Elias, G.A. Doreb, M.A. Robbins,

Diet modification to alter the course of age-related cognitive decline is becoming increasingly important. Few observational findings suggest that dairy food intake may be positively related to cognitive function, but research in this novel area is limited. The aim of this study was to investigate whether dairy food intake is associated with cognitive function, before and after adjustment for cardiovascular, lifestyle and dietary factors. To do this, a cross-sectional analyses of a subset of the community-based Maine-Syracuse Longitudinal Study (MSLS) sample (N = 972) was undertaken. It was determined that participants who consumed dairy products at least once per day had significantly higher scores on multiple domains of cognitive function compared with those who never or rarely consumed dairy foods, adjusting for cardiovascular risk factors, lifestyle and dietary factors. Frequent dairy food intake is associated with better cognitive performance but underlying causal mechanisms are still to be determined.

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