Supplement evidence

076 / 575Fiber & digestive

Oat beta-glucan

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The short answer

Soluble fiber that lowers LDL cholesterol when an effective daily dose is consumed.

Evidence and scope: Supported for specific outcomes
This status does not grade the ingredient for every goal, outcome, or person.
Important limitation: Evidence supports a specific outcome, not a general wellness or longevity effect.
Before deciding: Key concern: Increase gradually; separate medicines if the product substantially delays absorption.

01 / PRACTICAL GUIDE

Dose, absorption, and combinations

These are indication-specific reference or studied ranges—not a personalized prescription. Start with the objective, then check the form, label, medicines, and health conditions.

Reference range by objective

LDL cholesterolAt least 3 g/day oat beta-glucan

Reference or studied range—not a personalized prescription. The product label or a clinician may specify a different dose.

Dose source ↗

More is not automatically better. A clinician or product label may specify a different amount.

Absorption / solubilityFat/water classification is not the key factor

Fat/water solubility is not the useful decision point; preparation, fluid, timing, or strain identity matters more.

How it is commonly taken

Take with meals and adequate fluid.

Do not combine casually

Increase gradually; separate medicines if the product substantially delays absorption.

Dose and use source ↗

Dose and use links lead to primary or official source material. Search links are discovery tools, not proof that every returned paper applies.

02 / EVIDENCE

What the research says

We keep supportive, mixed, negative, safety, and contextual findings together. The headline never replaces the underlying papers.

2research papers in this ledger

59unique primary studies represented

4,181unique participants represented

These are audited counts for this JIVANA collection, not search-result totals. Participants are counted once when multiple papers use the same cohort; review papers are not added again to participant totals.

Open the research timelineResearch timeline

Entries are ordered by publication year. A study period appears only when the source reports it.

2021

Supports a specific usePMID 34236436 · NCT03911427

An oat beta-glucan beverage reduces LDL cholesterol in adults with borderline high cholesterol

LDL fell by 0.207 mmol/L more than control, approximately 6%; HDL, triglycerides, glucose, and insulin did not differ. Both groups had a transient increase in gastrointestinal symptoms, and the short surrogate trial did not test cardiovascular events.

Published: 2021Duration: 4 weeksn=207 participants

Study design and methods

Design: Randomized, blinded, placebo-controlled parallel trial
Population: 207 adults with LDL cholesterol of 3.0–5.0 mmol/L; 191 analyzed
Intervention: High-molecular-weight oat beta-glucan 1 g in water three times daily versus rice-powder control
Outcome: LDL and other metabolic risk markers

Open research record ↗

2016

Supports a specific usePMID 27724985

The effect of oat beta-glucan on LDL cholesterol, non-HDL cholesterol and apoB

LDL fell by 0.19 mmol/L, non-HDL by 0.20 mmol/L, and apoB by 0.03 g/L. Heterogeneity was considerable and clinical cardiovascular events were not measured, so the result supports modest lipid lowering rather than proven event prevention.

Published: 2016n=3,974 participants58 primary studies represented

Study design and methods

Design: Systematic review and meta-analysis of 58 randomized trials lasting at least 3 weeks
Population: 3,974 participants across controlled dietary trials
Intervention: Diets enriched with oat beta-glucan, median 3.5 g/day, versus control diets
Outcome: LDL cholesterol, non-HDL cholesterol, and apolipoprotein B

Open research record ↗

Unscreened discovery appendix—not evidence22 candidate publicationsSearch run: Aug 21, 2026

Complete for the displayed PubMed query at the search timestamp—not for all databases or every possible synonym. Candidates can be irrelevant, duplicate the same study, or report negative findings. They are never summed as evidence or participants until screened.

03 / SOURCES

Start with the source material

Official evidence overviewPubMed bounded human-evidence search Live PubMed discovery searchNational Library of Medicine

The live search is for discovery only. Search-result counts change and are not included in the audited totals above.

Recent PubMed discovery recordsDirect links to the first 12 records returned by the reproducible search. These are discovery candidates—not reviewed summaries or a count of supportive findings.

04 / EXPERT CONTEXT

Expert context—not evidence

Expert positions are dated context—not scientific evidence. They never raise the evidence status or become consensus by repetition.

No direct, source-verified endorsement is currently recorded. Research authorship or discussion alone is not treated as endorsement.