Side-by-side comparison of mechanisms, dosing, interactions, and stacking potential.
| Berberine | TUDCA (Tauroursodeoxycholic Acid) | |
|---|---|---|
| Category | Supplements | Supplements |
| Standard Dose | 500mg 2-3x daily (1000-1500mg total) | 250-500mg daily |
| Timing | With meals or immediately before meals (reduces postprandial glucose spike). Must be taken with food. | With meals for liver support. Some protocols recommend before meals to prime bile flow. |
| Cycle Duration | Cycle 8-12 weeks on, 4 weeks off (or continuous under practitioner supervision) | Cycle 4-8 weeks for liver support; ongoing at low dose for chronic liver conditions under supervision |
| Evidence Level | strong_human | Moderate-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)
TUDCA is a water-soluble bile acid conjugate (taurine + ursodeoxycholic acid) with potent hepatoprotective and cytoprotective properties. It inhibits the mitochondrial pathway of apoptosis by preventing BAX translocation to mitochondria and cytochrome c release. TUDCA reduces endoplasmic reticulum (ER) stress by acting as a chemical chaperone, assisting protein folding and reducing the unfolded protein response (UPR). It protects hepatocytes by stabilizing cell membranes, displacing toxic hydrophobic bile acids (chenodeoxycholic, lithocholic) from biliary epithelium, and promoting choleresis (bile flow). Additionally, it has neuroprotective effects via reduction of ER stress in neurons and modulation of the TGR5 bile acid receptor.
250-500mg daily
With meals for liver support. Some protocols recommend before meals to prime bile flow.
Cycle 4-8 weeks for liver support; ongoing at low dose for chronic liver conditions under supervision
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