Berberine
500 mg · 2-3×/day, with meals
Robert
Founder, F*CK Getting Old — independent researcher, not a medical professional.
Last reviewed · 2 cited sources
Evidence
- Human Studies
- 60
- Animal Studies
- 80
- Clinical Status
- Dietary Supplement
- Confidence
- Moderate
- Long-Term Safety
- Reasonably well-tolerated in trials up to several months; long-term (multi-year) human safety data is more limited than for metformin, its usual comparator
What this score is: a measure of how much research exists and how far along it is (animal-only vs. human trials, research-stage vs. FDA approved) — not how safe, effective, or worth trying a compound is. A low score usually means “early stage” or “understudied,” not “bad.” A high score doesn’t mean “better” for your goals than a lower-scored one.
This is not my personal rating of the compound, not a recommendation, and not medical advice. It’s a general research synthesis for informational purposes only, not a live literature count. See the linked research and talk to a licensed clinician before making decisions based on it.
Mechanism
Berberine is a plant alkaloid that activates AMPK, a cellular energy-sensing pathway, with effects on glucose and lipid metabolism comparable in some trials to metformin. Despite popular marketing comparisons to GLP-1 drugs, its effect size and mechanism are quite different — it does not meaningfully suppress appetite the way semaglutide does.
Common Protocols
- 500 mg, 2-3x daily with meals, commonly totaling 1000–1500 mg/day
- Often taken alongside the meals highest in carbohydrates
Side Effects
- GI upset (cramping, diarrhea) is common, especially when starting
- Can lower blood sugar — monitor closely if also on diabetes medication
Interactions
- Can have additive effects with diabetes medications, raising hypoglycemia risk — clinician supervision advised if combining
- Inhibits some liver enzymes (CYP3A4) that metabolize other drugs, similar to grapefruit — check for interactions with other medications
Practical Details
- Cost
- $
- Typical Dose
- 500 mg
- Storage
- Store in a cool, dry place
Key Studies & Reviews
- Zhao JV et al. (2023). Effect of berberine on glycemic and insulin-related traits: systematic review and meta-analysis of RCTs. J Nutr. PMID 37598753.
- Ju J et al. (2018). Efficacy and safety of berberine for dyslipidaemias: systematic review and meta-analysis. Phytomedicine. PMID 30466986.
Search the Research
Berberine FAQ
What is the typical Berberine dosage?
Commonly reported protocols: 500 mg, 2-3x daily with meals, commonly totaling 1000–1500 mg/day; Often taken alongside the meals highest in carbohydrates. Our reference entry uses 500 mg, 2-3×/day, with meals. These reflect protocols reported in research and user communities, not a medical recommendation — dosing should be decided with a clinician.
What are the side effects of Berberine?
Reported side effects include: GI upset (cramping, diarrhea) is common, especially when starting; Can lower blood sugar — monitor closely if also on diabetes medication.
Is Berberine FDA approved?
Berberine is sold as a dietary supplement. The FDA does not approve supplements for safety or effectiveness before they are sold, so third-party tested brands are worth seeking out.
How much research is there on Berberine?
Our evidence profile counts roughly 60 human and 80 animal studies, with moderate overall confidence. Long-term safety: Reasonably well-tolerated in trials up to several months; long-term (multi-year) human safety data is more limited than for metformin, its usual comparator.
Does Berberine interact with other drugs or supplements?
Can have additive effects with diabetes medications, raising hypoglycemia risk — clinician supervision advised if combining; Inhibits some liver enzymes (CYP3A4) that metabolize other drugs, similar to grapefruit — check for interactions with other medications.
Related compounds
Plant alkaloid studied for blood sugar; nicknamed "nature's Ozempic" in marketing (misleading)