SupplementsAdaptogensFatigue
Rhodiola rosea — also called roseroot, golden root or arctic root — grows in cold, high-altitude regions and has a long Scandinavian and Russian tradition as a tonic against fatigue. It is the adaptogen with the best evidence for stress-related fatigue and for mental performance under pressure.
Key takeaways
- Standardised to rosavins (~3%) and salidroside (~1%); trials use the SHR-5 extract.
- A phase-III trial found SHR-5 improved stress-related fatigue and concentration and blunted the cortisol awakening response.1
- Also studied for burnout and mild low mood — a classic trial eased fatigue in doctors on night duty.2
- Typical 200–600 mg/day; energising, so take earlier in the day.
What it is
Rhodiola rosea is a cold-climate succulent whose root is used as a tonic. The active markers are rosavins and salidroside; quality extracts (such as SHR-5) are standardised to roughly 3% rosavins and 1% salidroside.
Function in the body
Rhodiola is thought to modulate the stress response — influencing cortisol, the monoamine neurotransmitters (serotonin, dopamine, noradrenaline) and cellular stress proteins — to improve resistance to mental and physical fatigue. Unlike a stimulant, it works by raising fatigue resistance rather than by driving arousal, so it does not usually cause a "crash".
The evidence
In a randomised, placebo-controlled phase-III trial, SHR-5 (576 mg/day for 28 days) reduced stress-related fatigue, improved concentration and lowered the cortisol response to awakening.1 Earlier double-blind trials in physicians on night duty and in students under exam stress found less fatigue and better performance.2 Reviews rate the evidence as encouraging but limited by small, varied trials.
Dose & how to use
200–600 mg/day of a standardised extract (3% rosavins / 1% salidroside), taken in the morning or midday — often 30–60 minutes before demanding mental work. It can be used as a course during stressful periods.
Safety & who benefits
Well tolerated; occasional jitteriness, irritability or insomnia, mostly if taken late in the day. Use caution alongside stimulants, in bipolar disorder (it is activating) and in pregnancy (limited data). Best for people with stress-related burnout or fatigue, and for sustained concentration when tired.
References
Adult research summary for education, not a prescription. These are food supplements, not treatments for disease.
- Olsson EM, von Schéele B, Panossian AG. A randomised, double-blind, placebo-controlled, parallel-group study of the standardised extract SHR-5 of the roots of Rhodiola rosea in the treatment of subjects with stress-related fatigue. Planta Med 2009;75(2):105–12. pubmed.ncbi.nlm.nih.gov
- Darbinyan V, Kteyan A, Panossian A, et al. Rhodiola rosea in stress induced fatigue — a double blind cross-over study of a standardized extract SHR-5 with a repeated low-dose regimen on the mental performance of healthy physicians during night duty. Phytomedicine 2000;7(5):365–71. pubmed.ncbi.nlm.nih.gov
This article summarises nutrition science for education. It is not a substitute for individual medical advice; consult a professional before starting a supplement, in pregnancy, or alongside medication.