Metabolic & Cardiometabolic · Gut & Microbiome
pasteurized Akkermansia muciniphila improves insulin sensitivity
In plain terms: Does the gut bacterium Akkermansia improve how the body handles insulin?
Yes in one small human trial, but it's early and the authors have a commercial stake.
📅 Last reviewed: 2026-07-15 ⓘ
Evidence ladder
How far up the ladder this claim has climbed. A high consensus on a low rung means "consistent so far," not "proven in people."
Top evidence so far: Human trials (RCT / n-of-1)
How the studies fall
What the evidence shows
Pasteurized A. muciniphila improved insulin sensitivity, insulinaemia and total cholesterol in a small exploratory human RCT — but GLP-1 was not a demonstrated clinical endpoint, and the authors hold commercial IP.
The evidence (14)
| Source | Grade | Stance | Quality | Finding |
|---|---|---|---|---|
| Depommier C, et al. 2019 · Nat Med | RCT | supports | moderate | Proof-of-concept RCT n=32 pasteurized Akkermansia improved insulin sensitivity +28.6% P=.002 vs placebo |
| Chang Y et al 2026 · study_type: animal | animal | mixed | moderate | STZ-diabetic mice; A. muciniphila-derived EVs (AmEVs) improved glucose/insulin/pyruvate tolerance, outperforming heat-inactivated (pasteurized-analog) whole bacteria; no human insulin-sensitivity data |
| Shaheen 2025 · Microbiological Research | meta-analysis | mixed | moderate | Review of A. muciniphila finds consistent preclinical insulin-sensitivity benefit but still-limited and heterogeneous human metabolic data. |
| Pai 2022 · J Pers Med | observational | mixed | low | [FT-verified] JPM 2022 cross-sectional n=154 T2D low Akkermansia assoc greater IR; correlational |
| Abuqwider 2021 · Microorganisms | animal | supports | low | Review concludes A. muciniphila supplementation (live and pasteurized) is effective in preventing/treating obesity and insulin resistance preclinically. |
| Depommier 2021 · Gut Microbes | observational | mixed | low | Serum metabolomics from the human proof-of-concept trial identified A. muciniphila-driven shifts consistent with improved insulin sensitivity/metabolic health. |
| Wang 2022 · Frontiers in Endocrinology | RCT | tested-null | low | Adjuvant probiotic incl. Akkermansia in T1DM gave some immune/metabolic benefit but insulin-sensitivity endpoints were limited/heterogeneous. |
| Huang B et al 2025 · study_type: animal | animal | mixed | low | HFD mouse; novel strain AKM Lab-01 live+pasteurized+powdered all reduced weight gain (~10%) and improved glucose/lipids/insulin resistance; no HOMA-IR number given; n unspecified per group |
| Plovier 2016 2016 · Nat Med | animal | supports | moderate | [FT-verified] Plovier 2017 NatMed pasteurized Akk/Amuc_1100 improves metabolism obese/diabetic MICE. ANIMAL |
| Chelakkot 2018 · Experimental Molecular Medicine | animal | supports | moderate | A. muciniphila-derived extracellular vesicles improved gut barrier and glucose tolerance in HFD mice, a mechanistic route to insulin sensitivity. |
| Ojetti 2026 · Eur Rev Med Pharmacol Sci | RCT | supports | moderate | Inulin supplementation raised A. muciniphila and improved metabolic control in T1D subjects, linking higher Akkermansia to better glycemic outcomes. |
| Suenaert 2026 · Gut Microbes | RCT | mixed | moderate | [FT-verified] Suenaert 2026 phase-2 RCT PRIMARY Matsuda endpoint NULL in ITT; only subgroups+GLP-1 positive; downgrade supports->mixed |
| Lawenius 2020 · Am J Physiol Endocrinol Metab | animal | tested-null | moderate | Pasteurized A. muciniphila protected ovariectomized mice from bone loss; metabolic/insulin-sensitivity effects were modest in this model. |
| Depommier 2021b venue: Cells · Cells | mechanism | tested-null | low | Pasteurized A. muciniphila beneficially affected adipose/metabolic parameters in obese mice, reinforcing the insulin-sensitizing proof-of-concept. |
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Educational only, not medical advice. Grades and scores reflect published evidence weighted by study design and quality; see the methodology.