Rhodiola Rosea (Golden Root)
Updated October 11, 2026 · By Sophie Callahan
The Short Answer
Rhodiola rosea is an adaptogenic herb native to arctic and mountainous regions, studied for its ability to support mental performance under stress and fatigue. The standardized extract SHR-5 has been tested in double-blind RCTs at doses of 170–600 mg/day, showing improvements in cognitive function during sleep deprivation and high-demand work. Active compounds include rosavins and salidroside. Effects are most pronounced under conditions of mental fatigue rather than at baseline rest.
What is Rhodiola Rosea (Golden Root)?
Rhodiola rosea, also known as golden root or arctic root, is a perennial flowering plant that grows in cold, high-altitude environments across Scandinavia, Siberia, and the Arctic. It has been classified as an adaptogen — a substance that helps the body resist physical, chemical, and biological stressors without disrupting normal physiological function. The root contains over 140 identified compounds, with rosavins (rosavin, rosin, rosarin) and salidroside considered the primary active constituents. Quality supplements are standardized to 3% rosavins and 1% salidroside, matching the SHR-5 extract used in clinical research.
How it works
Rhodiola rosea modulates the hypothalamic-pituitary-adrenal (HPA) axis, the body's primary stress-response system. By influencing cortisol release and sensitivity, it helps maintain cognitive function during periods of acute and chronic stress. At the cellular level, salidroside activates AMPK and supports mitochondrial function, which may improve energy metabolism in neural tissue. Rhodiola also modulates monoamine neurotransmitters (serotonin, dopamine, norepinephrine), contributing to its effects on mood and mental stamina. The adaptogenic effect is most measurable under conditions of fatigue or stress — studies in rested, unstressed subjects show smaller or no improvements.
What the evidence says
Rhodiola rosea has been studied in military personnel, physicians, students, and athletes under conditions of stress and fatigue. The strongest evidence comes from trials using the SHR-5 standardized extract.
- Rhodiola rosea extract (170 mg/day) improved mental performance in physicians during night-duty fatigue. — A double-blind crossover study with repeated low-dose SHR-5 Rhodiola rosea extract in 56 young healthy physicians on night duty, measuring cognitive function tests during fatigue. (Darbinyan et al., 2000 (Crossover RCT))
Effective dosage
Clinical trials have used 170–600 mg/day of standardized Rhodiola extract. A 2000 double-blind crossover trial by Darbinyan et al. used 170 mg/day of SHR-5 in physicians during night duty. Acute stress studies have used higher doses (up to 600 mg). The extract should be standardized to 3% rosavins and 1% salidroside. Rhodiola is best taken in the morning or early afternoon, as its stimulating properties may interfere with sleep if taken in the evening.
Safety and interactions
Rhodiola rosea is generally well tolerated at doses up to 600 mg/day in studies lasting up to 12 weeks. Reported side effects are mild and uncommon: occasional dizziness, dry mouth, or sleep disturbance when taken late in the day. Rhodiola may interact with antidepressant medications (particularly SSRIs and MAOIs) due to its monoamine-modulating activity. It may have mild blood pressure-lowering effects. Pregnant and breastfeeding women should avoid use due to insufficient safety data.