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Evidence-Based Supplement Research
Evidence-Based Supplement Research
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Ginger and Reduced Hemoglobin A1c

Research synthesisLow evidenceSmall effect3 studies · 1 beneficial · 2 neutral · 0 harmful

Across 3 studies, 1 reported a beneficial moderate-sized effect on reducing hemoglobin A1c, while 2 found neutral effects (small effect size). The evidence base is too small to determine a most-studied dose, form, or population. The overall picture is mixed, with the only beneficial finding coming from a low-quality review, while two meta-analyses of higher quality found neutral results.

Caveats: Evidence base is small (only 3 studies) — conclusions should be considered preliminary. Many of the included studies did not reach statistical significance — effect may be smaller than the predominant direction suggests. The single beneficial finding came from a low-quality review (evidence score 1), while the two higher-quality meta-analyses (scores 5 and 6) found neutral effects, casting doubt on the reliability of the positive result.

Generated Jun 11, 2026
Safety in these studies
3 of 3 papers
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