Childhood obesity was associated with varied gut-microbe patterns
Studies comparing normal-weight and overweight children found differences in gut microbes, but results varied. The review does not establish that the microbes caused obesity or that changing them would improve weight.
Based on the published abstract. The full paper may contain additional methods, results and limitations.
The 30-second takeaway
The review found associations between childhood obesity and the composition and activity of gut microbes. Some bacterial groups repeatedly appeared in obesity-related findings, but results were not consistent across studies. These patterns do not establish cause and effect, and the abstract does not provide intervention results showing that altering gut microbes prevents or treats childhood obesity.
The authors describe substantial variation in the evidence and call for studies that follow children over time and use standardized methods. The abstract does not quantify the microbial differences or report specific intervention effects.
How the microbes were examined
All included studies used DNA sequencing of stool samples to examine gut microbes. They compared microbial profiles and related chemical profiles across weight groups. Many studies measured these differences at a single point in time.
Repeated associations were not a uniform pattern
Several bacterial groups were frequently linked with obesity-related traits. However, the ratio between two broad bacterial groups showed inconsistent associations. The review therefore does not identify a single microbial pattern that reliably characterizes all children with obesity.
The original publication
Association between gut microbiota and pediatric obesity: A systematic review.
Nóbrega R, Costa CFFA, Cerqueira Ó et al.
Nutrition · 2025
- PubMed ID
- 40714355
- Record checked
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