Rhodiola Rosea
Rhodiola rosea is an adaptogen used for fatigue. Doses in research typically sit around 400 mg per day. A systematic review of eleven trials concludes the results are contradictory.
What the research shows
Shown, with a clear condition or a limited scope.
The Wang (2025) meta-analysis pools 26 randomised studies with 668 participants and finds small effects that all point the same way: effect sizes of 0.32 for VO2max, 0.38 for time to exhaustion and 0.40 for time-trial performance. The researchers report no commercial ties. Against that stands the older systematic review by Ishaque (2012), which rated all eleven trials it found as high or unclear risk of bias, and the quality of the individual studies remains a weak point in the newer work as well. No effect was seen on inflammatory markers such as IL-6 and CRP. Small effects drawn from many small studies carry a reasonable rating and at the same time keep it away from proven.
Who it makes sense for: Most to be expected in endurance work and in mental fatigue, at 200 to 600 mg of standardised extract. For pure strength or muscle growth there is little to gain. Anyone on antidepressants or blood pressure medication should check with their doctor first, because rhodiola acts on the same signalling substances.
How we weigh evidenceClinical dosage
Origin
NaturalRhodiola rosea grows in cold mountain regions (Scandinavia, Siberia, Iceland). The root has been used for centuries in Scandinavian and Russian folk medicine against fatigue.
Safety
Well tolerated at 200 to 600 mg per day. The review summarising the literature is clear about quality: every included study has a high risk of bias or reporting flaws that hinder assessment. Two of six studies on physical fatigue and three of five on mental fatigue were positive.
For comparison
Vikings already used rhodiola to be stronger and more alert. It's one of the few adaptogens that has also been seriously evaluated by the European food authority (EFSA).
Dosage by weight and gender
The effective rhodiola rosea dose is 200-600mg extract per day, standardized to 3% rosavins and 1% salidroside (Ishaque et al., 2012). Body weight is not a relevant factor for dosing. There are no significant differences in effect between men and women. Take rhodiola on an empty stomach for best absorption. The effect is strongest when you cycle it (e.g. 8 weeks on, 2 weeks off) rather than using it continuously.
Frequently asked questions
What is rhodiola?
Rhodiola rosea is an adaptogenic plant that grows in cold mountain regions. It helps your body cope better with physical and mental stress, reduces fatigue, and can improve concentration.
Is rhodiola dangerous?
No, rhodiola is safe at doses up to 600mg per day. It has been used for centuries in Scandinavian and Russian folk medicine. Side effects are rare and usually limited to mild restlessness at overly high doses.
How much rhodiola per day?
Take 200-400mg rhodiola extract (standardized to rosavins) on an empty stomach, preferably in the morning. Cycling works better than continuous use: take it for 6-8 weeks then pause for 2 weeks.
Scientific sources
The clinical dosages on this page are based on peer-reviewed research.
- Rhodiola rosea for physical and mental fatigue: a systematic reviewIshaque S et al. (2012)
- The effect of Rhodiola rosea supplementation on endurance performance and related biomarkers: a systematic review and meta-analysisWang X et al. (2025)Funded by: Auteurs verklaren geen commerciële of financiele belangen.
Pre-workouts with Rhodiola Rosea
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BSN N.O.-Xplode
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We keep the dosages and values on this page as accurate as possible based on selected studies. New research may change these values. Nothing on this page is medical advice. If you have any doubts, always consult a doctor.