journal · Public research summary
Carbohydrate quality and human health: a series of systematic reviews and meta-analyses
Higher dietary fibre intake was associated with lower mortality and several noncommunicable diseases. Trials found improvements in bodyweight, systolic pressure and cholesterol.
Educational only. Associations do not establish individual risk or diagnosis. Read the original sources and limitations. Editorial review: 2026-10-06.
Citation
Reynolds et al. · The Lancet · 2019 · DOI: 10.1016/S0140-6736(18)31809-9
Study design
Evidence synthesis
Population
185 prospective studies and 58 clinical trials; 4,635 adults in the trials.
Geography
Multiple populations; not an Oceania-specific effect estimate
Finding
Higher dietary fibre intake was associated with lower mortality and several noncommunicable diseases. Trials found improvements in bodyweight, systolic pressure and cholesterol.
Estimate
Observational comparisons of highest vs lowest fibre intake suggested 15–30% lower relative risks across several outcomes—not one pooled risk or a promised benefit.
Measured relationship
Cohorts measured disease events; trials measured risk markers. These are complementary, not interchangeable outcomes.
Limitations
General-population evidence; people with chronic disease were excluded from the review's eligible studies. Diet measurement and confounding limit causal interpretation of event associations.