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Head-to-head evidence comparison — which supplement is right for you?
Berberine wins 1 of 3 categories. Both are solid choices — the best pick depends on your specific goals.
Verdict
Likely helps
12 of 16 studies with measurable effects showed benefit.
Top outcomes
Verdict
Likely helps
3 of 3 studies with measurable effects showed benefit.
Top outcomes
Shared outcomes (1)
Outcomes where both Berberine and Indole-3-Carbinol have evidence — compare verdict strength side-by-side.
500mg 2-3x daily (1000-1500mg total)
With meals, Split into 2-3 doses
Berberine HCl capsules
200-400mg daily
With food (reduces GI upset), Divided into 2 doses
I3C capsules or DIM (more stable)
4-12 weeks
8-12 weeks
First 2 weeks
If on diabetes medications
4-8 weeks
1-2 cycles
2-4 weeks
Acute
Clinical Efficacy of Curcumin, Resveratrol, Silymarin, and Berberine on Cardio-Metabolic Risk Factors Among Patients With Type 2 Diabetes Mellitus: A Systemic Review and Bayesian Network Meta-Analysis
Phytotherapy research : PTR (2025) · Meta analysis · n=1337
For HbA1c, silymarin was more effective than resveratrol (MD -2.08, 95%Cl -3.50 to -0.72) (P < 0.05).
Effects of berberine and barberry on selected inflammatory biomarkers in adults: A systematic review and dose-response meta-analysis of randomized clinical trials
Phytotherapy research : PTR (2023) · Meta analysis · n=1600
In addition, the non-linear analysis showed a significant lowering effect of berberine/barberry on IL-6 and TNF-α levels in doses <1000 mg/day and less than 5 weeks of intervention.
Berberine Ursodeoxycholate for the Treatment of Type 2 Diabetes: A Randomized Clinical Trial
JAMA network open (2025) · Rct · n=113
The study included 113 patients with T2D (mean [SD] age, 54.3 [10.6] years; 72 male [63.7%]) who were randomized.
Do Brassica Vegetables Affect Thyroid Function?-A Comprehensive Systematic Review
International journal of molecular sciences (2024) · Systematic review
We analyzed the results of 123 articles of in vitro, animal, and human studies, describing the impact of brassica plants and extracts on thyroid mass and histology, blood levels of TSH, T3, T4, iodine uptake, and the effect on thyroid cancer cells.
Indole-3-Carbinol: Occurrence, Health-Beneficial Properties, and Cellular/Molecular Mechanisms
Annual review of food science and technology (2023) · Systematic review
One of its main in vivo metabolites is 3,3'-diindolylmethane (DIM), formed by the condensation of two molecules of I3C.
WWP1 E3 ligase at the crossroads of health and disease
Cell death & disease (2023) · Systematic review
In this review, we discuss the evolutionary perspective, structure, and functions of WWP1 and its multilevel regulation by various regulators.
Based on meta-analyses showing FPG reduction of 0.59-0.82 mmol/L and HbA1c reduction of 0.63%. Studies primarily used berberine HCl with low bioavailability. Effects require divided doses and may take 8-12 weeks.
Based on single crossover RCT (n=148) showing significant improvement in 2-OHE1:16α-OHE1 ratio with I3C-containing supplement. Conservative estimates due to limited dose-response data and small study population. GI upset is primary dose-limiting side effect.
AI-estimated from published studies. Interpret as directional guidance.
Berberine has a higher evidence score (9/10 vs 7.5/10) and wins in 1 of 3 categories.
For reduce inflammation, Berberine has a higher relevance score (95 vs 60).
No known interactions between Berberine and Indole-3-Carbinol have been documented in our database. However, always consult a healthcare provider before combining supplements.