Side-by-side comparison of mechanisms, dosing, interactions, and stacking potential.
| Astragalus (Astragalus membranaceus) | Rhodiola Rosea | |
|---|---|---|
| Category | Adaptogens | Adaptogens |
| Standard Dose | — | 200-400mg daily (standardized to 3% rosavins, 1% salidroside) |
| Timing | — | Morning and/or early afternoon on empty stomach. AVOID evening dosing (stimulating). Take 30 min before meals. |
| Cycle Duration | — | Cycle 8-12 weeks on, 2 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.
Rhodiola's key bioactives are rosavin (unique to R. rosea), salidroside, and tyrosol. It modulates the HPA axis stress response by inhibiting cortisol release and stress-activated protein kinases (SAPKs/JNK). Salidroside activates AMPK, enhances mitochondrial biogenesis via PGC-1alpha, and stimulates glucose uptake. Rhodiola inhibits monoamine oxidase A and B (MAO-A, MAO-B), increasing synaptic serotonin, dopamine, and norepinephrine levels. It also stimulates Nrf2 antioxidant defense, increases erythropoietin (EPO) production, and enhances beta-endorphin levels during exercise.
200-400mg daily (standardized to 3% rosavins, 1% salidroside)
Morning and/or early afternoon on empty stomach. AVOID evening dosing (stimulating). Take 30 min before meals.
Cycle 8-12 weeks on, 2 weeks off
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