Adaptogens
Evidence: moderate_human
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.
Standard: 200-400mg daily (standardized to 3% rosavins, 1% salidroside)
Loading: 400-600mg/day for acute stress/fatigue (2-4 weeks)
Maintenance: 200mg/day
Administration: oral
Timing: Morning and/or early afternoon on empty stomach. AVOID evening dosing (stimulating). Take 30 min before meals.
Duration: Cycle 8-12 weeks on, 2 weeks off
Rhodiola is the 'energizing adaptogen' vs ashwagandha's 'calming adaptogen.' They stack well together (rhodiola AM, ashwagandha PM). The MAO interaction is the critical clinical concern — screen all psychotropic medications. The stimulating effect makes it excellent for fatigue, burnout, and cognitive performance but potentially problematic for anxiety-dominant presentations. Athletic performance evidence is growing — improved VO2 max, time to exhaustion, and RPE (rate of perceived exertion). Species authentication is important — R. rosea is the studied species.
Standardized to 3% rosavins and 1% salidroside (the ratio found in natural root). SHR-5 extract (Swedish Herbal Institute) is used in most clinical trials. Be wary of products standardized only to salidroside — this may indicate Rhodiola crenulata (different species) or synthetic adulteration. Brands: Nootropics Depot (verified R. rosea), Gaia Herbs, Life Extension.
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