膳食纤维的减重效应
创作:兵兵 审核:兵兵 2020年01月17日
  • 文章来源于62项实验,共涉及3877名参与者;
  • 研究结果显示:粘性纤维的摄入可以降低体重(−0.33 kg)、身体质量指数(BMI,−0.28kg/m2)和腰围(−0.63 cm),但是对体脂并无影响;
  • 在超重、糖尿病或代谢综合征的患病个体中,粘性纤维的减重效应更显著;
  • 粘性纤维对腰围和体脂的影响证据性较强,对体重的影响证据性中等,对BMI的影响证据性最弱;
  • 膳食粘性纤维可以小幅度但显著的降低体重和其他肥胖指标,且这种效应与热量限制无关。
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兵兵
【综述】文章收集了截止到2019.7.24日前发表的关于膳食粘性纤维与体重等的62项相关性研究(干预时间4周以上)。根据数据分析结果,粘性纤维的摄入可以降低体重等相关肥胖指标,且该效应与热量限制无关。并且,本文对相关证据的确定性进行了GRADE评定。该综述以膳食纤维的粘性为指标,而非其可溶性。文章推荐的粘性纤维摄入量为6.7g/d。
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Can dietary viscous fiber affect body weight independently of an energy-restrictive diet? A systematic review and meta-analysis of randomized controlled trials

膳食粘稠纤维干预体重与热量限制无关?系统综述与随机对照实验的荟萃分析

10.1093/ajcn/nqz292

2020-01-03, Article

Abstract & Authors:展开

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Background: The role of dietary fiber in obesity management remains debatable. Evidence suggests that intake of viscous fiber may have the potential to facilitate weight loss.
Objective: We aimed to summarize and quantify the effects of viscous fiber on body weight, BMI, waist circumference, and body fat, independent of calorie restriction, through a systematic review and meta-analysis of randomized controlled trials.
Methods: Trials ≥4 wk in duration that assessed the effect of viscous fiber supplemented to an ad libitum diet along with comparator diets were included. MEDLINE, EMBASE, and the Cochrane library were searched through 24 July, 2019. Two independent reviewers extracted relevant data. Data were pooled using the generic inverse variance method and random-effects models and expressed as mean differences with 95% CIs. Interstudy heterogeneity was assessed (Cochran Q statistic) and quantified (I2 statistic). The overall certainty of evidence was explored using the Grading of Recommendations, Assessment, Development, and Evaluation (GRADE) approach.
Results: Findings from 62 trials (n = 3877) showed that viscous fiber reduced mean body weight (−0.33 kg; 95% CI: −0.51, −0.14 kg; P = 0.004), BMI (in kg/m2) (−0.28; 95% CI: −0.42, −0.14; P = 0.0001), and waist circumference (−0.63 cm; 95% CI: −1.11, −0.16 cm; P = 0.008), with no change in body fat (−0.78%; 95% CI: −1.56%, 0.00%; P = 0.05) when consumed with an ad libitum diet. Greater reductions in body weight were observed in overweight individuals and those with diabetes and metabolic syndrome. The certainty of evidence was graded moderate for body weight, high for waist circumference and body fat, and low for BMI.
Conclusions: Dietary viscous fiber modestly yet significantly improved body weight and other parameters of adiposity independently of calorie restriction. Future trials are warranted to address the inconsistency and imprecision identified through GRADE and to determine long-term weight-loss sustainability.

First Authors:
Elena Jovanovski,Nourah Mazhar

Correspondence Authors:
Vladimir Vuksan

All Authors:
Elena Jovanovski,Nourah Mazhar,Allison Komishon,Rana Khayyat,Dandan Li,Sonia Blanco Mejia,Tauseef Khan,Alexandra L Jenkins,Lea Smircic-Duvnjak,John L Sievenpiper,Vladimir Vuksan

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