Some compounds made by gut bacteria (not the bacteria themselves) have shown promise in mice to help with blood sugar and inflammation, but we don’t yet know if they work in people with diabetes.

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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 many other studies and says that while postbiotics help diabetic mice, we still don’t have strong proof they work in humans — which is exactly what the claim says.

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Source Study

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

Score: 1

DOI: 10.3390/nu18010089

Similar Assertions

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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