Berberine
Also known as: Berberine HCl, Berberine Hydrochloride, Goldenseal Alkaloid
A quaternary ammonium isoquinoline alkaloid that activates AMP-activated protein kinase (AMPK), inhibits PCSK9, modulates gut microbiota composition, and upregulates insulin receptor expression.
Last reviewed: 2024-03-10 · 2 indexed studies
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Overview
Berberine is an isoquinoline alkaloid found in goldenseal, barberry, and Oregon grape. It has remarkable clinical evidence for glucose and lipid metabolism — often compared to metformin in head-to-head trials.
Mechanism & Function
Vivid yellow alkaloid powder — bitter, low oral bioavailability without delivery aids.
- Capsule
- Tablet
- Powder
- Liquid Cap
Capsule is generally preferred for bioavailability or efficacy.
Mechanism of Action
Activates AMPK (the master metabolic switch), enhancing glucose uptake in skeletal muscle independent of insulin. Inhibits PCSK9 increasing LDL receptor expression. Modulates gut microbiota producing short-chain fatty acids.
Physiological Role
Acts as a potent metabolic regulator across multiple tissues. In the liver, it reduces gluconeogenesis and lipogenesis. In muscle, it enhances GLUT4 translocation. In the gut, it increases Akkermansia muciniphila abundance.
Primary Pathways
Performance / Health Relevance
Not a performance supplement per se, but excellent for athletes managing body composition, insulin sensitivity, or metabolic health markers. May interfere with muscle adaptation via AMPK if timed poorly with training.
Evidence Review
Practical Use & Dosage
- Minimum Effective Dose
- 500mg/day
- Optimal Range
- 1000–1500mg/day split into 2–3 doses with meals
- Upper / Caution Level
- 2000mg/day
- Timing
- With meals (reduces GI side effects and enhances glucose-lowering effect)
- Best Format
- Berberine HCl capsules or dihydroberberine (enhanced bioavailability)
- Bioavailability
- Poor oral bioavailability (<5%) due to extensive first-pass metabolism. Dihydroberberine (GlucoVantage) shows 5x improved absorption.
- Absorption Considerations
- Take with meals. Split dosing is critical due to short half-life (~4 hours). Avoid combining with CYP enzyme substrates.
Safety & Interactions
Side Effects
- •GI cramping and diarrhea (common, dose-dependent)
- •Flatulence
- •Constipation (paradoxically in some)
Contraindications
- Pregnancy and lactation
- Neonatal jaundice
Drug Interactions
- •Metformin (additive hypoglycemia risk)
- •CYP2D6/CYP3A4 substrates
- •Cyclosporine
- •Macrolide antibiotics
Who Should Avoid
- •Pregnant/nursing women
- •Those on antidiabetic medications without physician supervision
- •Children
Monitoring
Monitor fasting glucose, HbA1c, and lipid panel at baseline and 8–12 weeks. Monitor liver enzymes periodically.
Frequently Asked Questions
Auto-generated from indexed evidence — dosage, safety, interactions, and more.
When is Berberine typically used or indicated?
Berberine is most commonly used for: Blood sugar management, Cholesterol support, Metabolic syndrome, Gut health. Acts as a potent metabolic regulator across multiple tissues. In the liver, it reduces gluconeogenesis and lipogenesis. In muscle, it enhances GLUT4 translocation. In the gut, it increases Akkermansia muciniphila abundance.
How does Berberine work?
Activates AMPK (the master metabolic switch), enhancing glucose uptake in skeletal muscle independent of insulin. Inhibits PCSK9 increasing LDL receptor expression. Modulates gut microbiota producing short-chain fatty acids.
What is the recommended dose of Berberine?
The optimal range is 1000–1500mg/day split into 2–3 doses with meals. with a minimum effective dose of 500mg/day. Best taken: With meals (reduces GI side effects and enhances glucose-lowering effect). Upper / caution level: 2000mg/day.
What are the side effects of Berberine?
Reported side effects include: GI cramping and diarrhea (common, dose-dependent); Flatulence; and Constipation (paradoxically in some). Monitoring: Monitor fasting glucose, HbA1c, and lipid panel at baseline and 8–12 weeks. Monitor liver enzymes periodically.
Does Berberine interact with medications?
Known or theoretical interactions: Metformin (additive hypoglycemia risk); CYP2D6/CYP3A4 substrates; Cyclosporine; and Macrolide antibiotics. Always check with a clinician before combining with prescription medication.
Who should avoid Berberine?
Berberine is generally not recommended for: Pregnant/nursing women; Those on antidiabetic medications without physician supervision; Children; Pregnancy and lactation; and Neonatal jaundice.
How strong is the evidence for Berberine?
Evidence level: Strong (overall score 76/100), based on 2 indexed studies on SuppIndex.
Research & References (2)
Berberine vs metformin in treatment of type 2 diabetes: a meta-analysis
Meta-analysis of 14 RCTs showing berberine comparable to metformin in reducing fasting glucose, HbA1c, and triglycerides.
Efficacy of berberine on lipid metabolism: a systematic review and meta-analysis
Berberine significantly reduced total cholesterol, LDL-C, and triglycerides across 27 trials.
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Research Overview
Strong EvidenceCite this ingredient
One-click citation export in APA, MLA, Chicago, BibTeX, or HTML. The URL below is stable and safe to link.
Stable URL
https://thesuppindex.com/ingredients/berberine
SuppIndex. (2026). Berberine: Evidence summary, dosage and clinical studies. Retrieved October 23, 2026, from https://thesuppindex.com/ingredients/berberine
Based on 2 indexed studies · Evidence level: Strong.
Goal Ratings
Stack Compatibility
Can combine with chromium and alpha-lipoic acid for comprehensive glucose support. Avoid timing around workouts (AMPK activation may blunt mTOR-mediated hypertrophy).