Evidence Hub

Impact of Probiotic Lactobacillus plantarum GKM3 on Gastrointestinal Health in Overweight and Obese Individuals: A Randomized Clinical Trial

You-Shan Tsai, Xin-Bei Lin, Shih-Wei Lin, Yen-Lien Chen, Chin-Lin Hsu, Chin-Chu Chen

Clinical Nutrition ESPEN, 2025

40 participants · 5 citations

Abstract

BACKGROUND & AIMS

Overweight and obesity, usually resulting from excess calorie intake, pose significant health challenges in modern societies and contribute to the development of chronic metabolic disorders. Gut microbes have been recognized as key regulators of energy utilization and gastrointestinal health. In this study, we investigated the effects of probiotics Lactobacillus plantarum strain GKM3 on overweight and obese subjects in a double-blind, randomized, placebo-controlled clinical trial.

METHODS

Participants, aged 20-40 with body mass index between 25.0-29.9 and body fat percentages over 25% for males and 30% for females, were divided into a placebo group (n=19) and a probioitcs group (n=40), receiving capsules containing either a placebo or the probiotics GKM3 for four weeks.

RESULTS

Our findings demonstrated that supplementation with strain GKM3 at 1g per day over the 4-week period significantly increased bowel movement frequency and alleviated symptoms such as gastroesophageal reflux, nausea, abdominal pain, and constipation. Fecal lipid analysis revealed elevated levels of triglycerides and total cholesterol compared to the placebo group. Microbiota analysis showed a significant reduction in obesity-associated taxa (Alcaligenaceae, Fusobacteriaceae, Acidaminococcus, Fusobacterium, and Megamonas) and an increase in beneficial genera (Akkermansia and Lactobacillus) following probiotic intervention.

CONCLUSION

Our study suggests that the strain GKM3 modulates gut…

How strong is the evidence?

Evidence Hub reads this as a randomized trial, done in people. Its evidence level is 2 of 5 (High · randomized trial). Randomized trials of a reasonable size are the strongest single-study design. Reported size: 40 participants or records.

How the five levels of evidence work. The level is assigned automatically from the abstract and can be wrong, so check the paper.

Read the paper

Related studies

Go deeper in Evidence Hub

Evidence Hub adds a study data sheet (design, sample size, evidence level, key numbers), an AI summary and a chat grounded in the paper's text.

Open this study Sign up free