Metabolic & Cardiometabolic
Does oat fibre lower bad cholesterol?
The claim, precisely: beta-glucan decreases LDL cholesterol
Strong support Metabolic & Cardiometabolic
RefutedContestedStrong support
consensus score 1.00
Yes — oat and barley beta-glucan modestly lowers bad cholesterol at about 3 grams a day.
Evidence ladder
How far up the ladder this claim has climbed. A high consensus on a low rung means "consistent so far," not "proven in people."
Top evidence so far: All trials, pooled (Meta-analysis)
MechanismIn-vitroAnimalObservationalRCTMeta-analysis
How the studies fall
5 support 0 contradict 0 tested null 0 mixed · 4 sources, 4 independent groups
What the evidence shows
Oat/barley beta-glucan lowers LDL ~0.25-0.27 mmol/L (and non-HDL, ApoB) at >=3 g/day — high-grade, non-contested across independent meta-analyses.
The evidence (5)
| Source | Grade | Stance | Quality | Finding |
|---|---|---|---|---|
| Ho HVT, et al. 2016 · Br J Nutr | meta-analysis | supports | high | Barley beta-glucan lowered LDL ~-0.25 to -0.27, also non-HDL & ApoB ⚠️ correction-on-file (Crossref) - kept, corrigendum not retraction |
| Whitehead A, et al. 2014 · Am J Clin Nutr | meta-analysis | supports | high | [FT-verified] FT 28 RCTs LDL -0.25 mmol/L (CI -0.30,-0.20) I2=22%; CAVEAT included in-house CreaNutrition reports |
| Xu 2021 · Br J Nutr | meta-analysis | supports | high | MA of 21 RCTs: >=3 g/d beta-glucan >=3wk lowered LDL-C 0.26 mmol/L |
| Yu 2022 · Nutrients | meta-analysis | supports | high | MA of 13 RCTs: oat beta-glucan lowered LDL-C 0.27 mmol/L and TC in hypercholesterolemic adults |
| Whitehead A, et al. 2014 · Am J Clin Nutr | meta-analysis | supports | high | LDL -0.25 mmol/L; underpins >=3 g/d health claim |
Educational only, not medical advice. Grades and scores reflect published evidence weighted by study design and quality; see the methodology.