scholarly journals Can dietary viscous fiber affect body weight independently of an energy-restrictive diet? A systematic review and meta-analysis of randomized controlled trials

2020 ◽  
Vol 111 (2) ◽  
pp. 471-485 ◽  
Author(s):  
Elena Jovanovski ◽  
Nourah Mazhar ◽  
Allison Komishon ◽  
Rana Khayyat ◽  
Dandan Li ◽  
...  
Keyword(s):  
Systematic Review ◽  
Weight Loss ◽  
Body Weight ◽  
Waist Circumference ◽  
Body Fat ◽  
Calorie Restriction ◽  
Meta Analysis ◽  
Controlled Trials ◽  
Randomized Controlled ◽  
Ad Libitum

ABSTRACT 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. This systematic review and meta-analysis was registered at clinicaltrials.gov as NCT03257449.

scholarly journals Soy Products Ameliorate Obesity-Related Anthropometric Indicators in Overweight or Obese Asian and Non-Menopausal Women: A Meta-Analysis of Randomized Controlled Trials

Nutrients ◽  
2019 ◽  
Vol 11 (11) ◽  
pp. 2790 ◽  
Author(s):  
Mu ◽  
Kou ◽  
Wei ◽  
Lu ◽  
Liu ◽  
...  
Keyword(s):  
Body Weight ◽  
Waist Circumference ◽  
Randomized Controlled Trials ◽  
Body Fat ◽  
Meta Analysis ◽  
Cochrane Library ◽  
Controlled Trials ◽  
Randomized Controlled ◽  
Reduced Body ◽  
Menopausal Women

Background: The effect of soy products on the weight of overweight or obese people is controversial, so we aimed to conduct a systematic review and a meta-analysis of published randomized controlled trials to analyze whether supplementation with soy products can help them to lose weight. Methods: The relevant data before January 2019 in PubMed, Embase and Cochrane Library were searched. A random-effect model was adopted to calculate the weighted average difference of net changes of body weight, body mass index (BMI), body fat percentage, fat mass, waist circumference, etc. Results: A total of 22 trials (870 overweight or obese participants) were reflected in the present meta-analysis. Analysis showed that soy products significantly reduced body weight, BMI, body fat percent and waist circumference in overweight or obese Asian populations (−0.37 kg, P = 0.010; −0.27 kg/m2, P = 0.042; −0.36%, P = 0.032; −0.35 cm, P = 0.049) and more significant effects were observed in non-menopausal women reduced body weight (−0.59 kg, P = 0.041), BMI (−0.59, P = 0.041) and waist circumference (−0.59 cm, P = 0.041) in overweight or obese populations. Conclusion: This meta-analysis showed that soy products have weight loss effects, mainly due to soy protein, isoflavone and soy fiber.

scholarly journals A systematic review of the effects of calcium supplementation on body weight

2006 ◽  
Vol 95 (6) ◽  
pp. 1033-1038 ◽  
Author(s):  
Rebecca Trowman ◽  
Jo C. Dumville ◽  
Seokyung Hahn ◽  
David J. Torgerson
Keyword(s):  
Systematic Review ◽  
Weight Loss ◽  
Body Weight ◽  
Randomized Controlled Trials ◽  
Dairy Products ◽  
Human Subjects ◽  
Calcium Supplementation ◽  
Meta Analysis ◽  
Controlled Trials ◽  
Randomized Controlled

Animal studies and epidemiological studies have suggested that Ca supplementation (with Ca supplements or dairy products) may be associated with weight loss in human adults. We aimed toassess whether any association was present by reviewing relevant randomized controlled trials in human subjects. The study was a systematic review and subsequent meta-analysis of randomized controlled trials that used Ca supplementation as an intervention in persons 18 or more years of age, and that reported body weight as a final outcome. A total of thirteen randomized controlled trials were included in the meta-analysis. There was no association between the increased consumption of either Ca supplements or dairy products and weight loss after adjusting fordifferences in baseline weights between the control and intervention groups (P=0·19 and 0·85, respectively). We therefore concluded that Ca supplementation has no statistically significant association with a reduction in body weight.

Effect of orlistat on plasma lipids and body weight: A systematic review and meta-analysis of 33 randomized controlled trials

2017 ◽  
Vol 122 ◽  
pp. 53-65 ◽  
Author(s):  
Amirhossein Sahebkar ◽  
Luis E. Simental-Mendía ◽  
Željko Reiner ◽  
Petri T. Kovanen ◽  
Mario Simental-Mendía ◽  
...  
Keyword(s):  
Systematic Review ◽  
Body Weight ◽  
Randomized Controlled Trials ◽  
Plasma Lipids ◽  
Meta Analysis ◽  
Controlled Trials ◽  
Randomized Controlled

scholarly journals Zinc Supplementation and Body Weight: A Systematic Review and Dose–Response Meta-analysis of Randomized Controlled Trials

2019 ◽  
Author(s):  
Shima Abdollahi ◽  
Omid Toupchian ◽  
Ahmad Jayedi ◽  
David Meyre ◽  
Vivian Tam ◽  
...  
Keyword(s):  
Systematic Review ◽  
Body Weight ◽  
Randomized Controlled Trials ◽  
Dose Response ◽  
Zinc Supplementation ◽  
Meta Analysis ◽  
Cochrane Library ◽  
Controlled Trials ◽  
Anthropometric Measures ◽  
Randomized Controlled

ABSTRACT The aim of this study was to determine the effect of zinc supplementation on anthropometric measures. In this systematic review and dose–response meta-analysis, we searched PubMed, Scopus, ISI Web of Science, and the Cochrane Library from database inception to August 2018 for relevant randomized controlled trials. Mean differences and SDs for each outcome were pooled using a random-effects model. Furthermore, a dose–response analysis for zinc dosage was performed using a fractional polynomial model. Quality of evidence was evaluated using the Grading of Recommendations Assessment, Development and Evaluation (GRADE) methodology. Twenty-seven trials (n = 1438 participants) were included in the meta-analysis. There were no significant changes in anthropometric measures after zinc supplementation in the overall analysis. However, subgroup analyses revealed that zinc supplementation increased body weight in individuals undergoing hemodialysis (HD) [3 trials, n = 154 participants; weighted mean difference (WMD) = 1.02 kg; 95% CI: 0.38, 1.65 kg; P = 0.002; I2 = 11.4%] and decreased body weight in subjects who are overweight/obese but otherwise healthy (5 trials, n = 245 participants; WMD = −0.55 kg; 95% CI: −1.06, −0.04 kg; P = 0.03; I2 = 31.5%). Dose–response analyses revealed a significant nonlinear effect of supplementation dosage on BMI (P = 0.001). Our data suggest that zinc supplementation increases body weight in patients undergoing HD and decreases body weight in individuals who are overweight/obese but otherwise healthy, although after normalization for study duration, the association observed in subjects who are overweight/obese disappeared. Although more high-quality studies are needed to reach a definitive conclusion, our study supports the view that zinc may be associated with body weight.

scholarly journals Almond Consumption and Risk Factors for Cardiovascular Disease: A Systematic Review and Meta-analysis of Randomized Controlled Trials

2019 ◽  
Vol 10 (6) ◽  
pp. 1076-1088 ◽  
Author(s):  
Michelle A Lee-Bravatti ◽  
Jifan Wang ◽  
Esther E Avendano ◽  
Ligaya King ◽  
Elizabeth J Johnson ◽  
...  
Keyword(s):  
Risk Factors ◽  
Systematic Review ◽  
Blood Pressure ◽  
Cardiovascular Disease ◽  
Body Weight ◽  
Randomized Controlled Trials ◽  
Meta Analysis ◽  
Controlled Trials ◽  
Randomized Controlled ◽  
Meta Analyses

ABSTRACT Evidence suggests that eating nuts may reduce the risk of cardiovascular disease (CVD). We conducted a systematic review and meta-analysis of randomized controlled trials (RCTs) evaluating almond consumption and risk factors for CVD. MEDLINE, Cochrane Central, Commonwealth Agricultural Bureau, and previous systematic reviews were searched from 1990 through June 2017 for RCTs of ≥3 wk duration that evaluated almond compared with no almond consumption in adults who were either healthy or at risk for CVD. The most appropriate stratum was selected with an almond dose closer to 42.5 g, with a control most closely matched for macronutrient composition, energy intake, and similar intervention duration. The outcomes included risk factors for CVD. Random-effects model meta-analyses and subgroup meta-analyses were performed. Fifteen eligible trials analyzed a total of 534 subjects. Almond intervention significantly decreased total cholesterol (summary net change: −10.69 mg/dL; 95% CI: −16.75, −4.63 mg/dL), LDL cholesterol (summary net change: −5.83 mg/dL; 95% CI: −9.91, −1.75 mg/dL); body weight (summary net change: −1.39 kg; 95% CI: −2.49, −0.30 kg), HDL cholesterol (summary net change: −1.26 mg/dL; 95% CI: −2.47, −0.05 mg/dL), and apolipoprotein B (apoB) (summary net change: −6.67 mg/dL; 95% CI: −12.63, −0.72 mg/dL). Triglycerides, systolic blood pressure, apolipoprotein A1, high-sensitivity C-reactive protein, and lipoprotein (a) showed no difference between almond and control in the main and subgroup analyses. Fasting blood glucose, diastolic blood pressure, and body mass index significantly decreased with almond consumption of >42.5 g compared with ≤42.5 g. Almond consumption may reduce the risk of CVD by improving blood lipids and by decreasing body weight and apoB. Substantial heterogeneity in eligible studies regarding almond interventions and dosages precludes firmer conclusions.

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