The Study
Association between dietary fiber intake and visceral fat volume: A cross-sectional study based on NHANES 2011-2018.
This study looked at a bunch of people and found that those who ate more fiber tended to have less belly fat. But it didn’t make anyone change their diet, so we don’t know if eating more fiber actually caused the belly fat to go down — maybe people with less belly fat just happen to eat more fiber for other reasons.
Analysis score
Maximum 44 for a cross-sectional study.
Where the score came from
This study looked at whether people who eat more fiber have less dangerous fat around their organs.
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 544 / 100
Quality score
Snapshots of a population at a single point in time, or descriptions of small groups. Can identify correlations and prevalence, but cannot determine cause and effect.
Key takeaways
Summary
Based on the study abstract and findings.
- 1Yes — since belly fat raises diabetes and heart disease risk, even small daily fiber increases could help lower that risk for many adults.
- 2People who ate 15–35 grams of fiber a day had 4% to 7.6% less belly fat than those who ate less than 15 grams — even if they had the same weight.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
Obesity research & clinical practice
Year
2026
Authors
Jiancheng Bo, Mingyue Yang, Qingchao Ru, Xin Guo
Related Content
Claims (6)
In U.S. adults aged 20–59, consuming more dietary fiber between 15 and 35 grams per day is linked to lower amounts of visceral fat compared to consuming less than 15 grams per day, with a measurable reduction of 4.1% to 7.6% across increasing intake levels.
Higher dietary fiber intake up to 35 grams per day is linked to lower visceral fat, and this link is stronger in women than in men.
U.S. adults aged 20–59 consume less dietary fiber than recommended, and those who eat more fiber have less visceral fat.
People who consume more dietary fiber tend to have lower volumes of visceral fat, even when accounting for their body weight, age, sex, and lifestyle habits.
People who consume more dietary fiber up to 35 grams per day have lower volumes of visceral fat, and this relationship continues to hold without leveling off at that intake level.
For every additional 10 grams of soluble fiber consumed per day, visceral fat accumulation decreases by 3.7%, regardless of changes in overall body weight.
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.