Morris Susan, Cater James D, Green Mark A, Johnstone Alexandra M, Brunstrom Jeffrey M, Stevenson Emma J, Williams Elizabeth A, Corfe Bernard M
Molecular Gastroenterology Research Group, Department of Oncology & Metabolism, The Medical School, The University of Sheffield, Sheffield S10 2RX, UK.
Department of Geography and Planning, School of Environmental Sciences, University of Liverpool, Liverpool, Liverpool, L69 3BX, UK.
Geriatrics (Basel). 2020 Feb 12;5(1):6. doi: 10.3390/geriatrics5010006.
The current dietary recommendation for protein intake in the UK is 0.75 g/kg/day, however, this population-wide recommendation does not necessarily reflect altered requirements for older adults to maintain muscle protein synthesis, nor does it encompass the potential impact of intake timing. Optimal muscle protein synthesis in older adults requires both higher intake requirements and a distribution of protein intake above a 25 g threshold, three times across the day. This study aimed to describe the protein intake of older adults in a UK region and compare the results to recommendations. The study re-assessed two existing datasets with rich diet information for older adults in the South Yorkshire area. Data were extracted from food diaries of 256 adults aged between 65 and 89 years old (mean ± SD 72.4 ± 5.3 years). Quantity and timing of intake were coded using Nutritics software and compared to recommendations. The relationship between body mass index (BMI), age, and protein intake was explored. Fewer than 50% of the participants met current UK recommendations (0.75 g/kg/day) and fewer than 15% met the ESPEN 1.2 g/kg/day age-specific recommendation. Only one participant met the 25 g/meal recommendation across three meals. These findings suggest that the older adult population is not achieving recommendations to maintain muscle protein synthesis. Nonetheless it identifies several straightforward opportunities for improvement, notably elevation of morning intake.
英国目前关于蛋白质摄入量的饮食建议是每天每千克体重0.75克，然而，这一适用于全体人群的建议并不一定反映老年人维持肌肉蛋白质合成的需求变化，也未涵盖摄入时间的潜在影响。老年人最佳的肌肉蛋白质合成既需要更高的摄入量，还需要在一天中三次摄入超过25克阈值的蛋白质。本研究旨在描述英国某地区老年人的蛋白质摄入量，并将结果与建议进行比较。该研究重新评估了两个现有的数据集，这些数据集包含南约克郡地区老年人丰富的饮食信息。数据取自256名年龄在65至89岁之间的成年人（平均±标准差 72.4 ± 5.3岁）的饮食日记。使用Nutritics软件对摄入量的数量和时间进行编码，并与建议进行比较。探讨了体重指数（BMI）、年龄和蛋白质摄入量之间的关系。不到50%的参与者达到了英国目前的建议摄入量（每天每千克体重0.75克），不到15%的参与者达到了欧洲临床营养与代谢学会（ESPEN）针对特定年龄的每天每千克体重1.2克的建议摄入量。只有一名参与者三餐都达到了每餐25克的建议摄入量。这些发现表明，老年人群体未达到维持肌肉蛋白质合成的建议摄入量。尽管如此，研究还是发现了几个可以直接改进的机会，尤其是增加早餐的摄入量。
