Side-by-side comparison of mechanisms, dosing, interactions, and stacking potential.
| Astragalus (Astragalus membranaceus) | Schisandra (Schisandra chinensis) | |
|---|---|---|
| Category | Adaptogens | Adaptogens |
| Standard Dose | — | 500-1000mg daily (standardized to >2% schisandrins) |
| Timing | — | Morning or split AM/PM. With meals. |
| Cycle Duration | — | Cycle 8-12 weeks on, 2-4 weeks off |
| Evidence Level | Moderate | moderate_human |
Contains cycloastragenol and astragaloside IV which activate telomerase (hTERT). Adaptogenic — modulates immune function, reduces inflammation, and supports cardiovascular health. Used in traditional Chinese medicine for Qi tonification.
Schisandra berries contain lignans (schisandrin A, B, C; gomisin A, N) that are the primary bioactives. Schisandrin B is a potent inducer of hepatic Phase I (CYP450) and Phase II (glutathione S-transferase, UDP-glucuronosyltransferase) detoxification enzymes. Schisandra activates Nrf2/ARE pathway, increases glutathione synthesis, and has hepatoprotective effects by stabilizing hepatocyte membranes. It modulates the HPA axis, reduces cortisol, enhances mental performance under stress via cholinergic and catecholaminergic modulation, and improves mitochondrial function through enhanced cytochrome c oxidase activity.
500-1000mg daily (standardized to >2% schisandrins)
Morning or split AM/PM. With meals.
Cycle 8-12 weeks on, 2-4 weeks off
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