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Evidence-Based Supplement Research
Evidence-Based Supplement Research
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Kefir and Reduced Fasting Blood Glucose Levels

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

Across 3 meta-analyses, 2 reported a moderate beneficial effect of kefir on reducing fasting blood glucose, while 1 found no significant effect (small effect size). The evidence suggests a potential benefit, but the overall effect size is moderate and limited by the small number of studies and mixed results.

Caveats: Evidence base is small (only 3 studies) — conclusions should be considered preliminary. The single neutral meta-analysis had a larger sample size (n=314) and a higher evidence quality score (6) compared to the two beneficial meta-analyses (score 4 each), raising concerns about potential publication bias or heterogeneity in study quality.

Generated Jul 14, 2026
3 of 3 papers
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