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Evidence-Based Supplement Research
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Bifidobacterium longum SP54 and Reduced Prevalence of Gestational Diabetes Mellitus

Research synthesisLow evidenceMixed effect size4 studies · 3 beneficial · 1 neutral · 0 harmful

Across 4 studies, 3 reported beneficial effects (small to moderate) but only 1 (a meta-analysis) reached statistical significance; the highest-quality RCT found no significant benefit. The evidence is primarily from generic probiotic interventions, not specifically Bifidobacterium longum SP54, and effect sizes are mixed. The most studied population is pregnant women, particularly those at high risk or overweight/obese.

  • Studied populations: pregnant women, especially those at high risk or overweight/obese

Caveats: Only 1 of 4 studies (the meta-analysis) reported a statistically significant finding—many did not, suggesting the true effect may be smaller than the beneficial trend implies. The highest-quality individual trial (RCT, n=271) found a neutral effect. Additionally, the included studies assessed generic probiotics, not exclusively Bifidobacterium longum SP54, so benefits may not apply to this specific strain. Evidence base is small (4 studies) and includes two narrative reviews with no original data, limiting certainty. Study durations and doses were not consistently reported.

Generated May 12, 2026
4 of 4 papers
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