Garlic trials suggest changes in diabetes markers, with low-quality evidence
Pooled studies reported lower blood sugar measures and total cholesterol. Several other blood fat measures showed no statistically significant change overall.
Based on the published abstract. The full paper may contain additional methods, results and limitations.
The 30-second takeaway
Garlic supplementation was linked to lower fasting blood sugar, the blood marker HbA1c, and total cholesterol in the pooled trials. Overall changes in LDL cholesterol, HDL cholesterol and triglycerides were not statistically significant. These laboratory findings come from low-quality, highly variable studies and do not establish fewer diabetes complications or a reliable benefit for an individual.
The authors judged the studies to be low quality. The abstract omits measurement units, intervention lengths and control treatments for the main pooled comparisons, making the size and practical meaning of the changes difficult to assess.
What these outcomes can show
The review focused on blood measurements rather than how people felt or functioned. Its abstract does not report changes in symptoms, quality of life or diabetes complications, so those outcomes cannot be inferred from the results.
Why consistency matters
The reported reductions in blood sugar measures and total cholesterol varied greatly between studies. That inconsistency makes the pooled averages harder to interpret, and the authors called for higher-quality trials to clarify the findings.
The original publication
The Therapeutic Effect of Garlic Supplements on the Metabolic Profile of Patients With Type 2 Diabetes: A Systematic Review and Meta-Analysis of Randomized Clinical Trials.
Ebrahimzadeh A, Safargar M, Rajabzadeh-Dehkordi M et al.
Nutr Metab Insights · 2026
- PubMed ID
- 41695233
- Record checked
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