Taking certain good bacteria supplements may slightly lower blood sugar and HbA1c in people with type 2 diabetes, but the effect isn't the same for everyone and depends on the type and amount of bacteria taken.

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Evidence from Studies

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Modulating the Gut Microbiome in Type 2 Diabetes: Nutritional and Therapeutic Strategies

Narrative Review

Human

2025 Dec 27

This study looked at multiple human trials and says probiotics might help lower blood sugar in people with type 2 diabetes, which matches what the claim says — but it doesn’t give exact numbers, so it’s not the strongest proof.

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Source Study

Modulating the Gut Microbiome in Type 2 Diabetes: Nutritional and Therapeutic Strategies

Score: 1

DOI: 10.3390/nu18010089

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