Berberine
500 mg · 2-3×/day, with meals
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
Research Links
Plant alkaloid studied for blood sugar; nicknamed "nature's Ozempic" in marketing (misleading)