Verdict No. 3058 · Search date 2026-09-08 · Methodology v1.0
Chemically characterized raw garlic equivalent to about 4 g, six days per week,
does it really help with Reduction of LDL-C in adults with moderate hypercholesterolemia?
30-Second Summary
D
Evidence Grade D · 30 · Safety caution
This verdict covers LDL-C after about 4 g raw garlic six days weekly for six months.
Caution. Raw garlic can cause gastrointestinal symptoms, odor, and allergy; high intake with anticoagulant or antiplatelet therapy requires bleeding-risk review.
What the
research showsGrade D with 30 points. In a 192-person trial with LDL-C as the primary outcome, six-month change was +0.4 mg/dL with raw garlic and -3.9 mg/dL with placebo; none of three garlic forms had a statistically or clinically significant effect.
research showsGrade D with 30 points. In a 192-person trial with LDL-C as the primary outcome, six-month change was +0.4 mg/dL with raw garlic and -3.9 mg/dL with placebo; none of three garlic forms had a statistically or clinically significant effect.
What the
ads claimIt should not be described as one clove acting like a statin or pooled indiscriminately with other formulations.
ads claimIt should not be described as one clove acting like a statin or pooled indiscriminately with other formulations.
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.
- Caution. Raw garlic can cause gastrointestinal symptoms, odor, and allergy; high intake with anticoagulant or antiplatelet therapy requires bleeding-risk review.
Chamgap Semantic Classification Code
Permanent code issued
F.raw-garlic.oral-food.ldl-cholesterol.reduce.placeboFoods and ingredients > Raw garlic > Oral food > LDL cholesterol > Reduction claim > Garlic-free food placebo
Bound to LDL-C with about 4 g raw garlic six days weekly for six months; powder and AGE remain 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 | F · Food, ingredient, or beverage |
|---|---|
| Canonical ingredient or intervention | Raw garlic |
| Source or part used | Fresh cloves of Allium sativum L. |
| Formulation or processing | California Early raw garlic incorporated into sandwiches |
| Route | Oral food |
| Dose | About one average 4-g clove, six days per week |
| Duration | Six months with monthly lipid measurements |
| Population | Adults aged 30-65 with LDL-C 130-190 mg/dL and no lipid-lowering medicine |
| Effect or condition | Lower LDL-C |
| Primary endpoint | Change in LDL-C over six months |
| Comparator | Matched garlic-free sandwich placebo |
| Duplicate-detection key | Raw garlic|California Early raw garlic incorporated into sandwiches|Oral food|Adults aged 30-65 with LDL-C 130-190 mg/dL and no lipid-lowering medicine|Lower LDL-C|Six months with monthly lipid measurements |
Gap Measurement · Verdict 3058 · D 30
What the research actually shows
The NCT00056511 trial was checked against independent placebo trials of garlic oil and garlic powder.
Why this is classified as D (30)
Replicated null direction (RX) and E0 govern the verdict; independent funding is a strength, but the study is under 200 participants, yielding D/30.
Counterpoint. Some older high-dose AGE or powder trials reported LDL reductions, but products and doses differed and stronger direct and independent null trials countered them.
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 | RX | Repeatedly refuted in the same indication |
| Independence | I2 | Decisive evidence is publicly or non-profit funded |
| Effect size | E0 | Null |
| Precision | C0 | The confidence interval leaves room for benefit |
The scoring table and the verdict agree (D).
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 |
|---|---|---|---|---|---|---|
| Effect of Raw Garlic vs Commercial Garlic Supplements on Plasma Lipid Concentrations in Adults With Moderate Hypercholesterolemia: A Randomized Clinical Trial | The cited design, allocation, masking, endpoint hierarchy, and analysis limitations were independently checked. | 90 | 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. |
| Effect of a Garlic Oil Preparation on Serum Lipoproteins and Cholesterol Metabolism: A Randomized Controlled Trial | The cited design, allocation, masking, endpoint hierarchy, and analysis limitations were independently checked. | 25 | 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).
Gardner CD et al. Arch Intern Med. 2007;167:346-353. PMID: 17325296. DOI: 10.1001/archinte.167.4.346. NCT00056511.
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] Raw Garlic for LDL Cholesterol—No Reduction in a 192-Person Six-Month Direct Comparison — Evidence Grade D·30. 2 cited sources checked. Source: https://chamgap.com/en/verdicts/heart/raw-garlic-moderate-hypercholesterolemia-ldl-c/ · 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.