Side-by-side comparison of mechanisms, dosing, interactions, and stacking potential.
| Berberine | Sulforaphane (from Broccoli Sprout Extract) | |
|---|---|---|
| Category | Supplements | Supplements |
| Standard Dose | 500mg 2-3x daily (1000-1500mg total) | — |
| Timing | With meals or immediately before meals (reduces postprandial glucose spike). Must be taken with food. | — |
| Cycle Duration | Cycle 8-12 weeks on, 4 weeks off (or continuous under practitioner supervision) | — |
| Evidence Level | strong_human | Strong |
Berberine activates AMP-activated protein kinase (AMPK), the master metabolic sensor, mimicking many effects of caloric restriction and exercise. It inhibits mitochondrial Complex I, increasing the AMP:ATP ratio which triggers AMPK. Downstream effects include enhanced GLUT4 translocation (glucose uptake), inhibition of HMG-CoA reductase (cholesterol synthesis), upregulation of LDL receptor expression, and suppression of PCSK9. It also modulates gut microbiome composition, increasing short-chain fatty acid-producing bacteria.
500mg 2-3x daily (1000-1500mg total)
With meals or immediately before meals (reduces postprandial glucose spike). Must be taken with food.
Cycle 8-12 weeks on, 4 weeks off (or continuous under practitioner supervision)
Isothiocyanate that activates Nrf2 — the master regulator of antioxidant defense. Upregulates glutathione synthesis, phase II detoxification enzymes, and heat shock proteins. Also inhibits HDAC (epigenetic modifier) and NF-kB (anti-inflammatory).
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