Is berberine safe?
The short answer
For most healthy adults, berberine has been well tolerated in clinical trials, and a 2025 meta-analysis described a favorable safety profile1. It is not for everyone. The common side effects are digestive2. It can change how the liver processes several medicines3. And it should not be taken in pregnancy or while breastfeeding, or given to infants24.
Key takeaways
What trials show about safety
Across randomized, placebo-controlled trials pooled in a 2025 meta-analysis, berberine showed a favorable safety profile alongside modest effects on several metabolic markers1. Most trials last weeks to months, so long-term data is thinner.
Side effects
The NIH’s complementary health center lists abdominal pain, constipation, diarrhea, nausea and vomiting as berberine’s common side effects2. Taking it with food and starting at a lower amount are the usual ways people reduce them.
Drug interactions
Berberine affects the liver enzymes that clear many medicines. In a controlled study, healthy men took 300 mg three times a day for two weeks; afterward, the activity of CYP2D6, CYP2C9 and CYP3A4 was reduced, which slowed the clearance of test drugs3. Those three enzymes process a large share of common prescriptions.
Berberine is also studied for its effect on blood glucose1, so combining it with diabetes medication without medical advice is not sensible. If you take any regular medication, ask your doctor or pharmacist before starting.
Who should avoid it
Anyone pregnant or breastfeeding, and infants. Berberine can cause or worsen jaundice in newborns and can lead to kernicterus, a serious condition24.
If you use a blend
Check every ingredient, not just the berberine. Thriviom’s Cutting Mix, for example, pairs 300 mg berberine HCl with yerba mate extract (a source of caffeine) and 100 mg 5-HTP (a serotonin precursor). That means its cautions include caffeine sensitivity and serotonergic medicines, too.
Common questions
Is berberine safe to take every day?
Daily use has been studied in trials lasting weeks to months, with a favorable safety profile. Long-term data is more limited, and it is not suitable in pregnancy, while breastfeeding, or alongside some medicines.
Is berberine bad for your liver or kidneys?
Trials have not flagged it as harmful to the liver or kidneys in healthy adults, but it does change how the liver processes several drugs. If you have liver or kidney disease, ask your doctor first.
Can I take berberine with metformin?
Only with your doctor’s advice. Berberine is studied for its effect on blood glucose, and combining it with diabetes medication needs medical supervision.
Where Thriviom fits
Cutting Mix
Every amount printed on the label, every batch tested by an independent lab, and the report for your lot is yours to look up. Read the full ingredient guide first if you are weighing it up.
Sources
- Liu D, et al. Efficacy and safety of berberine on the components of metabolic syndrome: a systematic review and meta-analysis of randomized placebo-controlled trials. Frontiers in Pharmacology, 2025.
- National Center for Complementary and Integrative Health In the News: Berberine. National Institutes of Health, 2023.
- Guo Y, et al. Repeated administration of berberine inhibits cytochromes P450 in humans. European Journal of Clinical Pharmacology, 2012.
- National Center for Complementary and Integrative Health Goldenseal: Usefulness and Safety. National Institutes of Health, accessed October 2026.
This article is for general education and is not medical advice. Talk to your doctor or pharmacist before starting a supplement, especially if you are pregnant, nursing, or take any medication. These statements have not been evaluated by the Food and Drug Administration. Thriviom products are not intended to diagnose, treat, cure, or prevent any disease.