Verdict No. 3064 · Search date 2026-09-08 · Methodology v1.0
Steam-distilled garlic oil 4 mg four times daily,
does it really help with Helicobacter pylori eradication?
30-Second Summary
C
Evidence Grade C · 46 · Safety warning
The 0/5 failure in a garlic-oil monotherapy pilot is recorded; antibiotic combinations are separate.
Warning. H. pylori requires validated antibiotic-based therapy and confirmation testing; substituting garlic can delay management of ulcer, bleeding, and gastric-cancer risk.
What the
research showsGrade C with 46 points. An uncontrolled pilot of steam-distilled garlic oil 4 mg four times daily for 14 days produced neither eradication nor suppression in any of five completers. Without a concurrent comparator or verified enrollment denominator, it is not a precise E0 estimate or replicated refutation; lower breath-test values in a 15-person raw-garlic before-after study were not eradication.
research showsGrade C with 46 points. An uncontrolled pilot of steam-distilled garlic oil 4 mg four times daily for 14 days produced neither eradication nor suppression in any of five completers. Without a concurrent comparator or verified enrollment denominator, it is not a precise E0 estimate or replicated refutation; lower breath-test values in a 15-person raw-garlic before-after study were not eradication.
What the
ads claimIn-vitro antibacterial activity or lower UBT values cannot be advertised as eradication or antibiotic replacement.
ads claimIn-vitro antibacterial activity or lower UBT values cannot be advertised as eradication or antibiotic replacement.
Useful facts when choosing a product
- This verdict applies only to the displayed formulation, route, dose, duration, population, endpoint, and comparator.
- Raw garlic, powder, garlic oil, stabilized-allicin products, aged garlic extract, black garlic, fermented garlic, and isolated S-allylcysteine are not interchangeable.
- Warning. H. pylori requires validated antibiotic-based therapy and confirmation testing; substituting garlic can delay management of ulcer, bleeding, and gastric-cancer risk.
Chamgap Semantic Classification Code
Permanent code issued
S.garlic-oil.oral.helicobacter-pylori-eradication.improve.uncontrolledSupplements and nutraceuticals > Garlic oil > Oral > H. pylori eradication > Improvement claim > Uncontrolled pilot
Issued for the 0/5 failure in an uncontrolled garlic-oil monotherapy pilot, not a precise E0; UBT-value change and antibiotic combinations are separate. The code identifies the intervention and claim; it never contains the evidence grade, score, or safety result.
Exact Claim Classification
These independent facets prevent evidence from different forms, routes, populations, effects, and comparators from being mixed.
| Intervention class | S · Supplement or nutraceutical |
|---|---|
| Canonical ingredient or intervention | Garlic oil |
| Source or part used | Essential oil from Allium sativum L. cloves |
| Formulation or processing | Steam-distilled garlic-oil capsules; sulfur-compound specification unverified |
| Route | Oral |
| Dose | 4 mg four times daily (16 mg/day) |
| Duration | 14 days; two post-treatment UBT visits at unverified intervals |
| Population | Adults with dyspepsia and confirmed H. pylori; five completers |
| Effect or condition | H. pylori eradication |
| Primary endpoint | Proportion negative on both post-treatment urea breath tests |
| Comparator | No concurrent comparator |
| Duplicate-detection key | Garlic oil|Steam-distilled garlic-oil capsules; sulfur-compound specification unverified|Oral|Adults with dyspepsia and confirmed H. pylori; five completers|H. pylori eradication|14 days; two post-treatment UBT visits at unverified intervals |
Gap Measurement · Verdict 3064 · C 46
What the research actually shows
The uncontrolled garlic-oil pilot, raw-garlic before-after UBT study, and antibiotic-background adjunct trials were separated by causal question.
Why this is classified as C (46)
With no confirmed strength, S and EX apply; an uncontrolled completer-only tiny pilot gives B2 and C/46. Human data exist, so neither no-human evidence nor replicated refutation (RX) applies.
Counterpoint. Allicin-containing antibiotic quadruple therapy is a combination regimen, not garlic monotherapy or evidence for replacing antibiotics.
Rejudgment record. Independent Codex cross-check — One formulation, route, population, claim, principal endpoint, and comparator
Scoring profile behind this grade
| Endpoint | S | Surrogate marker - laboratory or imaging measures |
| Replication | R1 | Single confirmatory trial |
| Independence | I1 | Mixed funding sources |
| Effect size | EX | The clinical size of the effect could not be judged |
| Precision | CX | No pooled confidence interval could be confirmed |
The scoring table and the verdict agree (C).
Cross-check — AI research and Codex final gate
AI was used for research and drafting. Blind grading, adversarial audit, and the methodology boundary rules were then reapplied before Codex performed the final evidence, grade, copy, and build checks. If a grade cannot be narrowed, both evidence positions and their reasons are published.
Evidence Table
| Study | Design | Sample | Funding | Endpoint | Result | Weight |
|---|---|---|---|---|---|---|
| A pilot study to determine the effectiveness of garlic oil capsules in the treatment of dyspeptic patients with Helicobacter pylori | The cited design, allocation, masking, endpoint hierarchy, and analysis limitations were independently checked. | 5 | Funding, product support, employee authorship, and declared conflicts were assessed separately. | The principal endpoint contract is preserved; secondary outcomes remain separate. | Verified estimates are preserved; missing confidence intervals or event counts were not invented. | Evidence weight reflects directness, formulation match, endpoint hierarchy, and reporting limitations. |
| Assessment of antibacterial effect of garlic in patients infected with Helicobacter pylori using urease breath test | The cited design, allocation, masking, endpoint hierarchy, and analysis limitations were independently checked. | 15 | Funding, product support, employee authorship, and declared conflicts were assessed separately. | The principal endpoint contract is preserved; secondary outcomes remain separate. | Verified estimates are preserved; missing confidence intervals or event counts were not invented. | Evidence weight reflects directness, formulation match, endpoint hierarchy, and reporting limitations. |
Receipt — 2 References
All 2 cited sources were verified for existence at the original page (as of 2026-09-08).
McNulty CA et al. Helicobacter. 2001;6:249-253. PMID: 11683929. DOI: 10.1046/j.1523-5378.2001.00036.x.
checkedZardast M et al. Avicenna J Phytomed. 2016;6:495-501. PMID: 27761418. PMCID: PMC5052411.
checkedResearch and draft: AI used · Cross-check: blind grading and adversarial audit
Final verification and publication gate: Codex · Verification cutoff: 2026-09-08 · Corrections: none
Final verification and publication gate: Codex · Verification cutoff: 2026-09-08 · Corrections: none
Cite this verdict
[Chamgap] Garlic-Oil Monotherapy for H. pylori—All Five Completers Failed Eradication, With No Basis for Replacing Antibiotics — Evidence Grade C·46. 2 cited sources checked. Source: https://chamgap.com/en/verdicts/gut/oral-garlic-alone-helicobacter-pylori-eradication/ · CC BY 4.0CC BY 4.0 — free to use with attribution; do not distort grades, numbers, or verdict meaning.
What this document does and does not do
Chamgap is an information source. It reports what research has and has not confirmed; it does not tell readers what to take or buy. That decision belongs to readers and, when needed, medical or legal professionals. This verdict reflects literature available up to the search date and may change as new research appears. Nothing here is medical advice.