MRC Human Nutrition Research, Elsie Widdowson Laboratory, 120 Fulbourn Road, Cambridge CB1 9NL, UK.
Food Chem. 2013 Oct 1;140(3):421-6. doi: 10.1016/j.foodchem.2012.07.092. Epub 2012 Jul 28.
Caffeine occurs naturally in the leaves and seeds of many plants and is artificially added to some beverages. Consumption of caffeine has been linked to both positive and adverse health outcomes. We incorporated estimates of caffeine content (mg/100g or ml) of foods and drinks, taken from the published literature, to provide a preliminary estimate of caffeine intake for the UK population, based on data collected in the National Diet and Nutrition Survey 2008-10. Among consumers mean total caffeine intakes of adult men 19+ y were significantly greater than intakes by boys 4-10y and 11-18y (p<0.05), with the same age-related differences seen for females. 4.1% of men 19+ y and 3.8% of women 19+ y had caffeine intakes in excess of 300mg/d. The addition of caffeine to UK food composition databases will allow more detailed study of the health effects of caffeine consumption.
咖啡因天然存在于许多植物的叶片和种子中，也被人为添加到一些饮料中。咖啡因的摄入与健康的好坏结果都有关系。我们综合了文献中公布的食物和饮料的咖啡因含量（mg/100g 或 ml）估计值，根据 2008-2010 年全国饮食和营养调查的数据，初步估算了英国人口的咖啡因摄入量。在消费者中，19 岁及以上成年男性的平均总咖啡因摄入量明显高于 4-10 岁和 11-18 岁的男孩（p<0.05），女性也存在同样的年龄相关差异。19 岁及以上的男性中有 4.1%，女性中有 3.8%，其咖啡因摄入量超过 300mg/d。在英国食物成分数据库中添加咖啡因，将使对咖啡因摄入的健康影响进行更详细的研究成为可能。
