Thorne Berberine Review
Editorial note: We review supplements independently. We are not affiliated with Thorne and we do not earn a commission from this review. Our score reflects the product’s ingredients and the evidence behind them. These statements have not been evaluated by the FDA.
A high-quality berberine from a brand known for testing. Berberine has some of the more interesting metabolic evidence among supplements, but it can upset the stomach and interacts with medications, so it is not for everyone.
Where to buy: Thorne ›What we like
- Rigorous testing and clean formulation
- Berberine has real metabolic evidence
- Trusted practitioner brand
- Clear, honest labeling
Keep in mind
- Commonly causes cramping or loose stools
- Interacts with several medications
- Best used with medical guidance
What it is
Thorne Berberine delivers berberine, a plant compound studied mainly for blood sugar and metabolic support, from a brand with a strong reputation for quality control and third-party testing.
The evidence
Berberine has some of the more promising human evidence in the supplement world for supporting healthy blood sugar and metabolic markers. That said, it commonly causes digestive side effects and can interact with medications, so it should be treated seriously rather than casually.
Who it is for
Worth considering if you want a high-quality berberine for metabolic support and can tolerate it, ideally with a clinician’s input. It is not a good pick if you take interacting medications or have a sensitive stomach.
How we researched this
- We reviewed the product’s published ingredients, dose, and third-party testing claims.
- We weighed the human evidence for those ingredients, not marketing language.
- We have no financial relationship with Thorne, and we note trade-offs honestly.
Frequently asked questions
Is berberine safe with my medications?
It interacts with several drugs, including some for blood sugar and cholesterol. Check with a clinician or pharmacist first.
Will it upset my stomach?
It can. Cramping and loose stools are common, especially at higher doses. Starting low can help.
This review is for general information and is not medical advice. Supplements are not intended to diagnose, treat, cure, or prevent any disease, and these statements have not been evaluated by the FDA. Talk with a qualified clinician before starting any supplement.
References and Further Reading
How we researched this: Our editorial team reviewed current clinical research and guidance from independent health authorities before writing and reviewing this article. You can verify the science yourself through the sources below.
