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Supplement × Prescription·Evidence index

Berberine and Metformin: what the research found

PubMed indexes 8 records that name Berberine and Metformin together, either in the title or in an interaction, co-administration, or pharmacokinetic context. The key findings come first, in the authors’ own words, followed by every study with its design and PubMed link.

A summary of published research, not medical advice. A pharmacist can check any combination against your full list of medicines and supplements.

Key findings

What the studies concluded.

Reviews and human studies first. Each quote is the authors’ own conclusion about their study, not a NutriStack assessment, and a single study is not a consensus.

“The combination of metformin and berberine exerts synergistic effects in ameliorating NAFLD by activating AMPK, downregulating SREBP1 and FASN, and improving lipid metabolism. These findings provide evidence supporting a potentially effective multi-modal treatment approach for NAFLD.”

Li et al. · 2025 · Human study · details

“MET and BER demonstrated beneficial effects on the intestinal microbiota, which was disturbed in NASH. This finding may explain the functional mechanism of MET and BER in NASH.”

Chen et al. · 2023 · Human study · details

“Ours is the first study to report that for women with PCOS, myo-inositol combined with D-chiro-inositol and metformin combined with thiazolidinediones appear superior to metformin alone in improving insulin resistance and decreasing total testosterone. Myo-inositol combined with D-chiro-inositol is particularly efficacious in menstrual recovery. Thiazolidinediones and metformin combined with thiazolidinediones…”

The research

8 studies naming Berberine and Metformin.

Strongest relevance first: papers naming both substances in the title, then human trials and systematic reviews.

Metformin and berberine synergistically improve NAFLD via the AMPK-SREBP1-FASN signaling pathway.

Scientific reports · 2025 · PMID 40790070

Human subjects

“The combination of metformin and berberine exerts synergistic effects in ameliorating NAFLD by activating AMPK, downregulating SREBP1 and FASN, and improving lipid metabolism. These findings provide evidence supporting a potentially effective multi-modal treatment approach for NAFLD.”

Li et al. · From the abstract

Names both Berberine and Metformin in its title.

Neuroprotective Effects of Metformin and Berberine in Lipopolysaccharide-Induced Sickness-Like Behaviour in Mice.

Advances in pharmacological and pharmaceutical sciences · 2024 · PMID 39346967

“Considering these, berberine warrants elaborate preclinical evaluation for neuroinflammation. Nevertheless, based on the effects observed, AMPK activators could regulate neuroinflammation, cognition, and oxidative stress linked with sickness-like behaviour.”

Kodi et al. · From the abstract

Names both Berberine and Metformin in its title.

Effect of berberine combined with metformin on autophagy in polycystic ovary syndrome by regulating AMPK/AKT/mTOR pathway.

Molecular reproduction and development · 2024 · PMID 39155689

Animal study

“In addition, berberine combined with metformin reduced the number of autophagosomes in granulosa cells, which may be related to AMPK/AKT/mTOR pathway activation, decreased Beclin1 and LC3II/LC3I levels, and increased p62 expression. Berberine combined with metformin could inhibit autophagy by activating the AMPK/AKT/mTOR pathway in PCOS, indicating that berberine combined with metformin is a potential treatment strategy for PCOS.”

Jin et al. · From the abstract

Names both Berberine and Metformin in its title.

Comparative efficacy of oral insulin sensitizers metformin, thiazolidinediones, inositol, and berberine in improving endocrine and metabolic profiles in women with PCOS: a network meta-analysis.

Reproductive health · 2021 · PMID 34407851

Network Meta-AnalysisHuman subjects

“Ours is the first study to report that for women with PCOS, myo-inositol combined with D-chiro-inositol and metformin combined with thiazolidinediones appear superior to metformin alone in improving insulin resistance and decreasing total testosterone. Myo-inositol combined with D-chiro-inositol is particularly efficacious in menstrual recovery. Thiazolidinediones and metformin combined with thiazolidinediones improve lipid metabolism better than metformin alone.”

Zhao et al. · Authors' conclusion

Names both Berberine and Metformin in its title.

Berberine and lycopene as alternative or add-on therapy to metformin and statins, a review.

European journal of pharmacology · 2021 · PMID 34801530

ReviewHuman subjects

“However, these reports must be interpreted with more considerations due to the low quality of the trials. The aim of this paper is to bring evidence about the management of cardiovascular diseases and diabetes through the use of nutraceuticals with particular attention to lycopene and berberine effectiveness.”

Hedayati et al. · From the abstract

Names both Berberine and Metformin in its title.

Abilities of berberine and chemically modified berberines to interact with metformin and inhibit proliferation of pancreatic cancer cells.

Advances in biological regulation · 2019 · PMID 31047842

ReviewHuman subjects

“Certain NAX compounds may interact with WT-TP53 and metformin treatment to alter the expression of key molecules involved in cell growth. These results suggest a therapeutic approach by combining certain pharmaceutical drugs and nutraceuticals to suppress the growth of cancer cells.”

Akula et al. · From the abstract

Names both Berberine and Metformin in its title.

Limitations

What this evidence cannot tell you.

Search-based evidence indexes have real limits, and it is worth being explicit about them:

How to read this page

A literature summary, not guidance.

NutriStack

Track what you actually take.

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NutriStack is an informational and organizational tool, not a medical service, and not a substitute for professional advice. Always consult a qualified healthcare professional before starting, stopping, or changing any supplement or medication.