Department of Food Science & Technology, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore.
Nutrients. 2021 Feb 18;13(2):661. doi: 10.3390/nu13020661.
Although animal protein is usually considered to be a more potent stimulator of muscle protein synthesis than plant protein, the effect of protein source on lean mass and muscle strength needs to be systematically reviewed. This study aimed to examine potential differences in the effect of animal vs. plant protein on lean mass and muscle strength, and the possible influence of resistance exercise training (RET) and age. The following databases were searched: PubMed, Embase, Scopus and CINAHL Plus with Full Text, and 3081 articles were screened. A total of 18 articles were selected for systematic review, of which, 16 were used for meta-analysis. Total protein intakes were generally above the recommended dietary allowance at the baseline and end of intervention. Results from the meta-analyses demonstrated that protein source did not affect changes in absolute lean mass or muscle strength. However, there was a favoring effect of animal protein on percent lean mass. RET had no influence on the results, while younger adults (<50 years) were found to gain absolute and percent lean mass with animal protein intake (weighted mean difference (WMD), 0.41 kg; 95% confidence interval (CI) 0.08 to 0.74; WMD 0.50%; 95% CI 0.00 to 1.01). Collectively, animal protein tends to be more beneficial for lean mass than plant protein, especially in younger adults.
虽然动物蛋白通常被认为比植物蛋白更能刺激肌肉蛋白质合成，但蛋白质来源对瘦体重和肌肉力量的影响需要系统地评估。本研究旨在检查动物蛋白与植物蛋白对瘦体重和肌肉力量的影响是否存在差异，以及抗阻运动训练（RET）和年龄的可能影响。检索了以下数据库：PubMed、Embase、Scopus 和 CINAHL Plus with Full Text，筛选了 3081 篇文章。共有 18 篇文章进行了系统评价，其中 16 篇用于荟萃分析。基础和干预结束时的总蛋白质摄入量通常高于推荐的膳食摄入量。荟萃分析的结果表明，蛋白质来源并不影响绝对瘦体重或肌肉力量的变化。然而，动物蛋白对瘦体重百分比有促进作用。RET 对结果没有影响，而年轻成年人（<50 岁）发现摄入动物蛋白可增加绝对和百分比的瘦体重（加权均数差（WMD），0.41kg；95%置信区间（CI），0.08 至 0.74；WMD，0.50%；95%CI，0.00 至 1.01）。总的来说，动物蛋白对瘦体重的益处大于植物蛋白，尤其是在年轻成年人中。
