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Head-to-head evidence comparison — which supplement is right for you?
Berberine wins 2 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 4 studies with measurable effects showed benefit.
Top outcomes
500mg 2-3x daily (1000-1500mg total)
With meals, Split into 2-3 doses
Berberine HCl capsules
1000-2000mg
Morning, With or without food
Calcium alpha-ketoglutarate powder or capsules
4-12 weeks
8-12 weeks
First 2 weeks
If on diabetes medications
4-6 months
4-8 weeks
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.
AKG and the aging epigenome
Nature (2022) · Preclinical
Regulates epigenetic enzymes
Recruitment evaluation of a gerotherapeutic randomized controlled trial testing alpha-ketoglutarate in biologically older, middle-aged adults (ABLE)
Experimental gerontology (2025) · Rct · n=120
Eligibility rates were 80.3 % at pre-screening and 67.3 % at screening, with a consent rate of 66.1 %.
Effects of Multi-Ingredient Pre-Workout Supplement and Caffeine on Bench Press Performance: A Single-Blind Cross-Over Study
Nutrients (2022) · Crossover · n=15
In a cross-over manner, they participated in two sessions where they were blinded to the order of supplementation they were given: either a MIPS including caffeine or caffeine alone.
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 RCT (n=40) showing prevention of performance decline in track athletes. Effect was prevention of countermovement jump height decrease rather than enhancement. Limited evidence from one small study.
AI-estimated from published studies. Interpret as directional guidance.
Berberine has a higher evidence score (9/10 vs 8.5/10) and wins in 2 of 3 categories.
For metabolic health, Berberine has a higher relevance score (95 vs 70).
No known interactions between Berberine and Calcium AKG have been documented in our database. However, always consult a healthcare provider before combining supplements.