Effects of cereal beta-glucan consumption on body weight, body mass index, waist circumference and total energy intake: A meta-analysis of randomized controlled trials

2019 ◽  
Vol 43 ◽  
pp. 131-139 ◽  
Author(s):  
Jamal Rahmani ◽  
Ali Miri ◽  
Raminta Černevičiūtė ◽  
Jacqueline Thompson ◽  
Nurun Nisa de Souza ◽  
...  
Nutrients ◽  
2019 ◽  
Vol 11 (11) ◽  
pp. 2790 ◽  
Author(s):  
Mu ◽  
Kou ◽  
Wei ◽  
Lu ◽  
Liu ◽  
...  

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.


2019 ◽  
Vol 3 (Supplement_1) ◽  
Author(s):  
Kelly Higgins ◽  
Joshua Hudson ◽  
Richard Mattes ◽  
Nilupa Gunaratna ◽  
Bethany McGowan ◽  
...  

Abstract Objectives Total energy intake is the product of portion size (PS), the energy content of an ingestive event, and ingestive frequency (IF), the number of ingestive events per unit time. An alteration in either portion size or ingestive frequency, that is not compensated by the other, must result in a change in energy intake and, if maintained over time, body weight. The primary objective of this meta-analysis was to assess the independent effects of PS and IF on dietary energy intake and body weight among healthy adults in randomized controlled trials. Methods 8,614 articles (duplicates removed) published through 2018 with no date restriction were identified with PubMed, Web of Science, Cochrane, and CINAHL databases. The articles were divided among ten researchers and each article was screened for eligibility by two to three independent reviewers. Exclusion criteria included: populations <19 y and >65 y, unhealthy, assessment <24 h in duration, and controlled feeding trials. Studies investigating the effect of IF or PS on body weight were at least 4 weeks in duration. Eleven articles (IF = 3, PS = 8) met the inclusion criteria. There were not enough articles to assess the effect of PS on body weight. Results There was significant heterogeneity in the effect sizes among all comparisons (I2 = >50%). Consuming smaller portion sizes was associated with lower 24 h energy intake [–135 kcal (–249, –21), n = 15; WMD (95% CI), n = comparisons]. In contrast, IF was not associated with a difference in 24 h energy intake [–103 kcal (–230, 24), n = 5], but was positively related to body weight in trials ≥6 wk duration [0.40 kg (0.70, 0.11), n = 4]. Conclusions Results from RCTs support that greater PS but not IF is associated with higher daily energy consumption. However, IF is positively associated with increased body weight over time. Funding Sources NA


Author(s):  
Hyun Suk Lee ◽  
Junga Lee

(1) Background: Exercise interventions for overweight and obese individuals help reduce accumulated visceral fat, which is an indicator of cardiometabolic risk, but the effectiveness of these interventions is controversial. The purpose of this meta-analysis was to investigate the effectiveness of exercise interventions in overweight and obese individuals in order to reduce weight, body mass index (BMI), and accumulated visceral fat, and increase lean body mass. (2) Methods: Databases were used to select eligible studies for this meta-analysis. Randomized controlled trials with control and experimental groups were included. The degrees of effectiveness of the exercise interventions were computed to assess the benefits on reducing weight, BMI, and accumulated visceral fat, and increasing lean body mass. (3) Results: Sixteen studies were included in this meta-analysis. Participation in exercise interventions reduced weight (d = −0.58 (95% confidence interval (CI), −0.84–−0.31; p < 0.001; k = 9)), BMI (d = −0.50 (95% CI, −0.78–−0.21; p < 0.001; k = 7)), and accumulated visceral fat (d = −1.08 (95% CI, −1.60–−0.57; p < 0.001; k = 5)), but did not significantly increase lean body mass (d = 0.26 (95% CI, −0.11–0.63; p = 0.17; k = 6)). The average exercise intervention for overweight and obese individuals was of moderate to vigorous intensity, 4 times per week, 50 min per session, and 22 weeks duration. (4) Conclusions: Participating in exercise interventions has favorable effects on weight, BMI, and accumulated visceral fat. Further studies considering different modalities, intensities, durations, and measurements of fatness need to be conducted.


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