The Study
Association between the gut microbiota composition and alpha-diversity on the hormonal response and appetitive measures of individuals with obesity after a meal either rich in ultra-processed foods or without ultra-processed foods: secondary analysis of a randomized clinical trial.
This study found that people with more diverse gut bacteria felt fuller after eating, but it doesn't prove that the bacteria caused the fullness. It just shows they went together, and maybe the type of food made a difference.
Analysis score
Maximum 90 for a randomized controlled trial.
Where the score came from
Scientists gave people with obesity two meals that had the same calories and nutrients — one with lots of processed foods, one without. They looked at gut bacteria and how full people felt after eating.
Where does this study sit?
Reviews of RCTs (Meta-analyses)
Max 100Randomized Trials
Max 90Reviews of Cohort Studies
Max 85Cohort Studies
Max 72Reviews of Case-Control Studies
Max 63Case-Control Studies
Max 58Cross-Sectional & Case Series
Max 50Expert Opinion
Max 543 / 100
Quality score
Participants are randomly assigned to treatment or control groups, minimizing bias. The gold standard for testing whether an intervention causes an effect.
Key takeaways
Summary
Based on the study abstract and findings.
- 1This suggests that eating less processed food might help your gut bacteria help you feel satisfied after eating, which could help control overeating.
- 2People with more diverse gut bacteria felt fuller after eating, especially after the meal without ultra-processed foods.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
Clinical nutrition ESPEN
Year
2025
Authors
Nayara Gomes Graciliano, Ana Debora Santos de Oliveira, Guilherme César Oliveira de Carvalho, Maria Bárbara Galdino-Silva, K.M.M. Almeida, Samyra Araújo Monteiro Carvalho, N. Bueno
Related Content
Claims (2)
About one-quarter of the American diet consists of ultra-processed foods with additives and flavor combinations that alter gut microbiota and lead to metabolic dysfunction.
In people with obesity, greater diversity of gut bacteria at the genus level is linked to feeling fuller after eating, and this effect is more pronounced after eating meals that do not contain ultra-processed foods.
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.