Trial reportJournal of gastrointestinal surgery : official journal of the Society for Surgery of the Alimentary Tract2009
Probiotics improve outcomes after Roux-en-Y gastric bypass surgery: a prospective randomized trial.
Trial report in Journal of gastrointestinal surgery : official journal of the Society for Surgery of the Alimentary Tract, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to 3 registered trials, which are not on this map. Cited by 93 papers, 13 of them syntheses that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Effect of Bacillus Coagulans and Galactomannans on Obese Patients Undergoing Sleeve Gastrectomy
Do Symbiotics Provide Helpful Benefits in Gastrointestinal Related Issues in Weight Loss Surgery Patients?
The Effects of a Synbiotic Supplement on Metabolic & Cognitive Outcomes and Vitamin D Receptor Variants on Bone Health Among Adults
Who cites it
93 citing papers in PubMed, 13 syntheses or guidelines pooled it.
- The effect of probiotics on weight management in patients with severe obesity undergoing metabolic and bariatric surgery: a systematic review and meta-analysis.Annals of medicine · 2025Pooled it
- Pooled it
- Pooled it
- Effects of probiotics in patients with morbid obesity undergoing bariatric surgery: a systematic review and meta-analysis.International journal of obesity (2005) · 2023Pooled it
- Probiotic Supplementation and Micronutrient Status in Healthy Subjects: A Systematic Review of Clinical Trials.Nutrients · 2021Pooled it
- Pooled it
- Safety and Efficacy of Bariatric Surgery in Inflammatory Bowel Disease Patients: a Systematic Review and Meta-analysis.Obesity surgery · 2020Pooled it
- Gut Microbiota, Probiotics and Psychological States and Behaviors after Bariatric Surgery-A Systematic Review of Their Interrelation.Nutrients · 2020Pooled it
- Pooled it
- Effect of Lactobacillus on body weight and body fat in overweight subjects: a systematic review of randomized controlled clinical trials.International journal of obesity (2005) · 2017Pooled it
- Clinical practice guidelines for the perioperative nutritional, metabolic, and nonsurgical support of the bariatric surgery patient--2013 update: cosponsored by American Association of Clinical Endocrinologists, The Obesity Society, and American Society for Metabolic & Bariatric Surgery.Obesity (Silver Spring, Md.) · 2013Guideline
- Pooled it
- Clinical practice guidelines for the perioperative nutritional, metabolic, and nonsurgical support of the bariatric surgery patient--2013 update: cosponsored by American Association of Clinical Endocrinologists, the Obesity Society, and American Society for Metabolic & Bariatric Surgery.Endocrine practice : official journal of the American College of Endocrinology and the American Association of Clinical EndocrinologistsGuideline
- Effect of DailyMedicina (Kaunas, Lithuania) · 2025Trial
- Trial
- Impact of Probiotics on Gastrointestinal Function and Metabolic Status After Roux-en-Y Gastric Bypass: A Double-Blind, Randomized Trial.Obesity surgery · 2024Trial
- Effects of Probiotic Use on Gastrointestinal Symptoms in the Late Postoperative Period of Bariatric Surgery: A Cross-Over, Randomized, Triple-Blind, Placebo-Controlled Study.Obesity surgery · 2024Trial
- Effect of Lactobacillus plantarum LMT1-48 on Body Fat in Overweight Subjects: A Randomized, Double-Blind, Placebo-Controlled Trial.Diabetes & metabolism journal · 2023Trial
- Does probiotic supplementation aid weight loss? A randomized, single-blind, placebo-controlled study with Bifidobacterium lactis BS01 and Lactobacillus acidophilus LA02 supplementation.Eating and weight disorders : EWD · 2021Trial
- Trial
33 more citing papers are in PubMed but not listed here.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
7 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
introductionRoux-en-Y gastric bypass (RNYGB) surgery offers an effective and enduring treatment for morbid obesity. Gastric bypass may alter gastrointestinal (GI) flora possibly resulting in bacterial overgrowth and dysmotility. Our hypothesis was that daily use of probiotics would improve GI outcomes after RNYGB.
methodsForty-four patients undergoing RNYGB were randomized to either a probiotic or control group; 2.4 billion colonies of Lactobacillus were administered daily postoperatively to the probiotic group. The outcomes of H(2) levels indicative of bacterial overgrowth, GI-related quality of life (GIQoL), serologies, and weight loss were measured preoperatively and at 3 and 6 months postoperatively. Categorical variables were analyzed by chi(2) test and continuous variables were analyzed by t test with a p < 0.05 for significance.
resultsAt 6 months, a statistically significant reduction in bacterial overgrowth was achieved in the probiotic group with a preoperative to postoperative change of sum H(2) part per million (probiotics = -32.13, controls = 0.80). Surprisingly, the probiotic group attained significantly greater percent excess weight loss than that of control group at 6 weeks (controls = 25.5%, probiotic = 29.9%) and 3 months (38.55%, 47.68%). This trend also continued but was not significant at 6 months (60.78%, 67.15%). The probiotic group had significantly higher postoperative vitamin B12 levels than the control group. Both probiotic and control groups significantly improved their GIQoL.
conclusionIn this novel study, probiotic administration improves bacterial overgrowth, vitamin B12 availability, and weight loss after RNYGB. These data may provide further evidence that altering the GI microbiota can influence weight loss.
Indexed as
Identifiers
19381735What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.