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Akkermansia muciniphila: Exploratory Metabolic Trial

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The 2019 exploratory trial enrolled 40 adults, of whom 32 completed three months.

The 2019 exploratory trial enrolled 40 adults, of whom 32 completed three months. Pasteurized Akkermansia improved insulin sensitivity by 28.62% relative to placebo and reduced insulin and total cholesterol measures. The small pilot does not establish durable clinical benefits, weight-loss efficacy, or superiority over live bacteria.

Key Findings

  • Forty adults with overweight or obesity and insulin resistance were enrolled; 32 completed the trial. Participants received live bacteria, pasteurized bacteria or placebo for three months. [1]
  • Pasteurized Akkermansia improved the measured insulin-sensitivity estimate by 28.62% ± 7.02% versus placebo (p=0.002). This is a metabolic marker, not a demonstrated reduction in diabetes complications. [1]
  • Insulinemia decreased by 34.08% ± 7.12% and total cholesterol by 8.68% ± 2.38% versus placebo in the pasteurized group. [1]
  • The reported 2.27 kg weight decrease versus placebo did not meet conventional statistical significance (p=0.091). [1]
  • A significant result for pasteurized bacteria versus placebo does not itself prove superiority to live bacteria. The separate 2017 membrane-protein study was conducted in mice. [1][2]

Study Details

Supplementation with Akkermansia muciniphila in overweight and obese human volunteers: a proof-of-concept exploratory study
Depommier C, Everard A, Druart C, Plovier H, Van Hul M, Vieira-Silva S, Falony G, Raes J, Maiter D, Delzenne NM, de Barsy M, Loumaye A, Hermans MP, Thissen JP, de Vos WM, Cani PD — Nature medicine (2019)
Exploratory randomized trial with 40 enrolled and 32 completers. Pasteurized bacteria improved selected metabolic markers versus placebo; the weight difference was not statistically significant.
40 participantsModerate

Practical Takeaway

This trial provides an early human signal for certain metabolic markers, with 32 completers and three months of follow-up. The studied dose was 10 billion bacteria daily, but the findings do not establish a routine treatment, lasting weight loss, or benefit across commercial products and populations.

Summary

A small 2019 proof-of-concept trial of live or pasteurized Akkermansia muciniphila in adults with overweight or obesity and insulin resistance.

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Frequently Asked Questions

Does this establish a treatment for a damaged gut barrier?

No. Gut-barrier markers were exploratory outcomes in a small metabolic trial. A change in a marker is not proof of a clinical treatment for a broad condition described as leaky gut.

Was pasteurized Akkermansia proven better than live bacteria?

The trial reported several significant pasteurized-versus-placebo results. That does not by itself demonstrate a statistically supported advantage over the live formulation.

How long was the trial?

The intervention lasted three months. It does not establish when benefits begin, whether they persist after stopping, or the effects of years of use.

Who participated?

The study enrolled adults with overweight or obesity and insulin resistance. Its results should not automatically be generalized to children, lean healthy adults or people with different diseases.

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Supplement Guide

Akkermansia

Bottom line: Akkermansia is a next-generation postbiotic with strong metabolic benefits in its first human RCT. Promising for metabolic health, but still early-stage with limited product options.

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References

  1. Depommier C, Everard A, Druart C, Plovier H, Van Hul M, Vieira-Silva S, et al. (2019). Supplementation with Akkermansia muciniphila in overweight and obese human volunteers: a proof-of-concept exploratory study. Nature Medicine. DOI PubMed
  2. Plovier H, Everard A, Druart C, Depommier C, Van Hul M, Geurts L, et al. (2017). A purified membrane protein from Akkermansia muciniphila or the pasteurized bacterium improves metabolism in obese and diabetic mice. Nature Medicine. DOI PubMed