Rhodiola rosea Effects: Roseroot for Mental Exhaustion and Poor Concentration
A root from the far north that has been studied for stress-related fatigue and concentration. What the data show, where they are thin, and why roseroot is not the same as ashwagandha.
Exhaustion is not a character flaw. It is a signal from your nervous system, which has been running at full throttle for too long. A plant may turn that signal down. But the listening is still up to you.
I bet you know this moment. It is 3 p.m. You are reading the same paragraph for the third time. The words slide off you like rain off a windowpane.
You actually slept enough. On paper, at least. Still, your head feels like a browser with forty open tabs. Everything is loading. Nothing quite runs.
At some point you come across the name rhodiola. Roseroot. Golden root. An adaptogen that supposedly brings energy and focus. And maybe you wonder whether that is the same thing as the ashwagandha your friend takes for stress.
The short answer: no. The long answer is in this article. I will show you what studies on the effects of Rhodiola rosea in mental exhaustion have actually observed, where the data are weak, and for which type of exhaustion the plant might even be worth considering.
What to expect here
- What roseroot is and where it comes from
- What studies show in stress exhaustion
- Honestly: studies that found nothing
- Mechanisms: cortisol, messengers, energy
- The nerve-immune axis through the KPNI lens
- Rhodiola vs. ashwagandha: activating vs. calming
- Endurance and physical performance
- Safety and interactions
What exactly is roseroot?
Imagine a plant that grows on barren rocks in Scandinavia, Siberia and the Alps. Cold, wind, few nutrients. It survives where others give up. This very image is what earned Rhodiola rosea its reputation.
The part used medicinally is the rhizome. When cut, it smells faintly of roses, hence the name. In the folk medicine of northern Europe and Russia, it has been used for centuries for tiredness and weakness.
A review by Alexander Panossian and colleagues counted around 140 constituents in the rhizome in 2010. Two groups are the focus of research: salidroside and the rosavins. The rosavins are considered typical of the species Rhodiola rosea. Salidroside also occurs in related Rhodiola species.
An adaptogen is not an energy drink. The idea behind it: a substance that might help your system adapt to strain, rather than simply whipping it up.
Important for your assessment: through its Committee on Herbal Medicinal Products (HMPC), the European Medicines Agency EMA lists roseroot as a traditional herbal medicinal product for symptoms of stress such as fatigue and a feeling of weakness. A review by psychiatrists from Germany, Switzerland and Austria describes roseroot as the most important adaptogen with this classification. "Traditional" here means: the approval rests on long experience of use, not on clinical proof of efficacy.
"Herbal and traditional" sounds gentle and harmless. But it only means that the use is old. It says little about how strong the effect is.
That is why it is worth looking at the studies. Including the ones that found nothing.
And now you know why the word "adaptogen" alone does not justify a purchase.
Can rhodiola help with stress-related exhaustion?
Sleepiness means: you could fall asleep at any moment. Stress exhaustion means: you are drained, can barely concentrate, yet often still cannot find rest.
This second picture, exhausted concentration after prolonged stress, is the area in which roseroot has been studied most often.
The most important study for this question comes from Sweden.
A team led by Erik Olsson at Uppsala University gave 60 people with stress-related exhaustion syndrome either the roseroot extract SHR-5 or placebo for 28 days. Both groups improved markedly, a classic placebo effect. In direct comparison, however, the roseroot group did better: on the burnout scale, on several attention scores and on the cortisol response after waking.
For you, this means: in genuine stress exhaustion, roseroot might have an effect beyond placebo. With 60 participants and 4 weeks, though, that is an indication, not proof.
Olsson EM, von Schéele B, Panossian AG. Planta Med. 2009;75(2):105-112. DOI: 10.1055/s-0028-1088346Researchers from Yerevan studied 56 young doctors during their night shifts. For two weeks each, they took a low-dose roseroot extract or placebo and completed tests of short-term memory, arithmetic and concentration.
In the first two weeks, the roseroot phase did significantly better. This fits the idea that the plant might support mental performance mainly under acute strain.
Darbinyan V et al. Phytomedicine. 2000;7(5):365-371. DOI: 10.1016/S0944-7113(00)80055-0In Russia, 161 young cadets received a single dose of roseroot extract in two strengths or placebo. An index of mental fatigue was measured. Both roseroot groups did clearly better than placebo, with no difference between the doses.
Interesting: the authors explicitly describe the standard dose in the tradition of a psychostimulant. That is a key to the later comparison with ashwagandha.
Shevtsov VA et al. Phytomedicine. 2003;10(2-3):95-105. DOI: 10.1078/094471103321659780Add to this a large open study from the German-speaking region. Siegfried Kasper from Vienna and Angelika Dienel gave a roseroot extract to 118 people with burnout symptoms for 12 weeks. Most scales improved, some after just one week. Important: there was no placebo group, and one of the authors worked for the manufacturer. The study was explicitly intended as preparation for later controlled studies.
In the Swedish burnout trial, the placebo group also improved markedly. That is not a weakness of the study. It shows how powerful attention, structure and the expectation of improvement are in exhaustion.
Roseroot might add a small extra effect on top. Other things build the foundation.
And now you know why, when it comes to exhaustion, I never talk about just one plant.
The honest side: studies that found nothing
Maybe you have already tried products that were described online as miracle remedies. And then? Nothing. That feeling matters. Because research on roseroot also has sobering results.
A team from the University of Alberta gave 48 nursing students working shifts roseroot or placebo for 42 days. The result was surprising: on vitality and on the fatigue scale, the placebo group ended up doing better.
The authors themselves urge cautious interpretation. For you, though, the study shows: roseroot is not a sure thing, and shift work with a disrupted rhythm may be a different problem from stress exhaustion.
Punja S, Shamseer L, Olson K, Vohra S. PLoS One. 2014;9(9):e108416. DOI: 10.1371/journal.pone.0108416In 2012, a team from Alberta screened eleven controlled studies on physical and mental fatigue. Three of five studies on mental fatigue found a benefit, but all studies had a high or unclear risk of bias. A group led by Edzard Ernst, also with eleven studies, came to a similar conclusion in 2011: possible benefits, but too few independent replications.
So the evidence is contradictory. The signal is there, but it is quiet and needs better studies.
Ishaque S et al. BMC Complement Altern Med. 2012;12:70. DOI: 10.1186/1472-6882-12-70 · Hung SK, Perry R, Ernst E. Phytomedicine. 2011;18(4):235-244. DOI: 10.1016/j.phymed.2010.08.014A more recent study from Granada also tempers expectations for the mind. Eighteen young adults took roseroot or placebo for four days and were then mentally fatigued with a concentration test. Roseroot had only very small effects on mental fatigue and visual processing. The authors saw the benefit more in physical strength performance.
Supported by several small RCTs: indications of less exhaustion and better concentration under acute stress and in stress-related exhaustion syndrome.
Contradictory: effects in healthy people without stress load and in shift work.
Open: large, independent long-term studies over several months.
And now you know why I see roseroot not as a solution, but as possible support.
How might roseroot act in the body?
Imagine your stress system as a smoke detector. In danger, it should be loud. But after months of constant stress, it goes off at the smell of toast. And at some point the battery is dead. Many exhausted people swing back and forth between exactly these states.
Research describes several possible points of action for roseroot. Panossian and colleagues summarized them in 2010: influence on the stress axis with a rather dampening effect on cortisol, on stress signaling pathways in the cell, and on cellular protective proteins such as heat shock proteins.
Hypothalamus and pituitary
Constant stress keeps the stress axis in alarm mode. Studies suggest that roseroot might dampen the cortisol response, as measured on waking in the Swedish burnout trial.
Messengers in the brain
Animal and cell studies describe effects on messenger systems and their receptors that are involved in mood, drive and attention.
Cellular stress defense
Protective proteins such as heat shock proteins help cells withstand strain. Roseroot appears to influence them in laboratory studies.
Immune system and inflammation
In an animal model, salidroside was able to dampen the activation of the brain's immune cells. This is the bridge to the nerve-immune axis.
A 2016 review by Jay Amsterdam from Pennsylvania and Panossian describes a network of effects on neuroendocrine, immunological and messenger systems. That sounds big. But keep in mind: these mechanisms come mostly from laboratory and animal studies.
A counterexample from muscle research is instructive. US Air Force researchers gave trained men roseroot for four days and used magnetic resonance to measure energy recovery in the muscle. There was no difference from placebo. The often claimed "energy boost for the cell" could not be shown there.
Roseroot is probably not fuel that you top up. More like a damper for the oversensitive smoke detector.
If that is true, the benefit lies not in more energy out of nowhere, but in less energy lost to constant alarm.
And now you know why the plant is more worth considering in stress-related exhaustion than in tiredness for other reasons.
The nerve-immune axis: exhaustion through the KPNI lens
Do you know the feeling of being sick without being sick? Heavy limbs, withdrawal, fog in your head. Like the flu, just without the fever. Clinical psychoneuroimmunology has an explanation for this that takes the pressure off many people.
Your immune system and your brain talk to each other constantly. During an infection, immune cells send messengers to the brain. The brain responds with sickness behavior: tiredness, lack of drive, withdrawal. That is clever. Your body saves energy for defense.
Chronic stress can quietly switch this program on without any infection being present. The microglia, your brain's immune cells, then shift into an irritated state. The nervous system feels the fog. The immune system keeps a silent inflammation going. Metabolism redirects energy. The hormonal system, with its cortisol, loses its clear daily rhythm.
A team from Tianjin exposed mice to chronic unpredictable stress and gave them salidroside. The animals showed less depression-like behavior, and markedly fewer activated microglia were seen in the hippocampus. In cell cultures, salidroside dampened inflammatory signaling pathways and the release of inflammatory messengers.
This is biologically plausible and fits the KPNI view. In humans, it has not yet been conclusively demonstrated.
Fan Y, Bi Y, Chen H. Front Pharmacol. 2021;12:635762. DOI: 10.3389/fphar.2021.635762Energy is not a luxury. Energy is freedom. The freedom to still have a conversation in the evening, read a book or simply be present. That is what matters to me with exhaustion, not just a lab value.
From the KPNI perspective, an important consequence follows. If your exhaustion is driven by silent inflammation, iron deficiency, a thyroid disorder, sleep apnea or long COVID, no plant can replace addressing that cause. At best, roseroot would then turn a symptom down a little.
Exhaustion is often not a lack of will, but a protective program. Your body puts on the brakes because it perceives something as a threat.
So the first question is not "What gives me energy?", but "What is my body protecting me from right now?"
And now you know why clarifying the causes comes before any plant.
Rhodiola or ashwagandha: activating or calming?
On the shelf, they stand side by side. Both are called adaptogens. Both promise less stress. Many products even combine them. And this is exactly where the greatest confusion arises.
Imagine two dials. One is called drive. The other is called calm. Roseroot seems to turn the first one more, ashwagandha the second. If you turn both up at the same time, you often do not know afterwards what actually had an effect.
Rhodiola rosea
- Traditionally classified as a mild stimulant
- Studies mainly on tiredness, concentration, performance under stress
- Tends to fit the picture: drained, unfocused, low on drive
- In studies, usually taken in the morning or before noon
- Interaction via CYP2C9 shown in humans
Ashwagandha
- Rather calming, studied for stress, anxiety and sleep
- Indications of lowered cortisol under constant stress
- Tends to fit the picture: tense, wired, sleeping poorly
- Often used in the evening
- Case reports involving the thyroid and liver
A team from Hyderabad gave 64 stressed adults an ashwagandha root extract or placebo for 60 days. In the ashwagandha group, stress and anxiety scores and blood cortisol fell markedly more.
So the profile is different: ashwagandha has mainly been studied as a calmer of the stress axis, roseroot more for exhausted performance.
Chandrasekhar K, Kapoor J, Anishetty S. Indian J Psychol Med. 2012;34(3):255-262. DOI: 10.4103/0253-7176.106022A systematic review from Lublin compiled randomized studies on both plants in 2025. A total of 24 studies met the criteria, with durations between 3 and 16 weeks. For both plants, the authors describe indications of less stress and better psychological resilience, but emphasize short durations, small groups and inconsistent methods.
The question is not "Which adaptogen is better?", but "Which type of exhaustion am I right now?"
If you are wired and ruminating at night, you probably do not need extra drive. If you are drained and cannot get going in the morning, you probably do not need even more dampening.
You can find more on the differences among adaptogens in my article Adaptogens explained. What ashwagandha can do and who it may make sense for is covered in my ashwagandha basics article.
And now you know why I never lump the two plants together.
Endurance and the body: what sports studies show
Maybe you do not only notice the exhaustion in your head. Stairs feel steeper. The workout that used to give you energy now drains it. Roseroot has been studied here too, mainly in young, healthy athletes.
A Chinese-Malaysian team analyzed 26 randomized studies with 668 healthy participants in 2025, with an average age of 22. With roseroot, maximal oxygen uptake, time to exhaustion and time-trial performance improved slightly. Lactate and creatine kinase, a marker of muscle strain, were lower. Inflammatory markers such as interleukin 6 and CRP did not change.
Because of large differences between the studies, the authors urge caution. For you: these are data from trained young people, not from people with pathological exhaustion.
Wang X, Yang X, Gao Z, Zeng J, Liu Y. Front Nutr. 2025;12:1645346. DOI: 10.3389/fnut.2025.1645346A 2026 football study from Beijing additionally found faster reactions and better decisions under fatigue after four weeks. Exciting, but here too it involved 24 young men. The bridge to the office day of an exhausted person is a long one.
With exhaustion, more performance is rarely the goal. The goal is for strain to cost you less.
If you crash for days after light activity, that is a warning sign that should be checked by a doctor. Then protecting your energy budget matters more than any adaptogen.
And now you know why sports data tell only part of the story.
Safety, depression and interactions
Herbal does not mean ineffective. And whatever can have an effect can also have side effects. That applies to roseroot just as much as to any tablet.
Jun Mao and colleagues at the University of Pennsylvania compared roseroot, the antidepressant sertraline and placebo over 12 weeks in mild to moderate depression. Sertraline reduced symptoms the most, roseroot barely more than placebo, and the groups did not differ with statistical certainty. On the other hand, 63 percent reported side effects with sertraline, 30 percent with roseroot and 17 percent with placebo.
For you, this means: roseroot was well tolerated, but it is not a substitute for depression care.
Mao JJ et al. Phytomedicine. 2015;22(3):394-399. DOI: 10.1016/j.phymed.2015.01.010A team from Trondheim gave 13 healthy volunteers a commercially available roseroot product for 14 days and then tested the breakdown of several probe drugs. The liver enzyme CYP2C9 was about 21 percent slower. The other enzymes tested were not affected.
The effect is moderate. But it could become relevant for drugs with a narrow therapeutic range that are broken down via CYP2C9, such as warfarin or phenytoin.
Thu OK, Spigset O, Nilsen OG, Hellum B. Eur J Clin Pharmacol. 2016;72(3):295-300. DOI: 10.1007/s00228-015-1988-7- With blood thinners such as warfarin or with antiepileptic drugs
- With antidepressants or other psychiatric medication
- In bipolar disorder, as stimulating substances can be critical
- With blood pressure or blood sugar medication, as data are lacking
- In pregnancy and breastfeeding, as there are insufficient data
- With trouble falling asleep, as taking it late might be stimulating
Most positive studies used standardized extracts with a defined content of rosavins and salidroside. Many products on the market are not comparable. Some contain other Rhodiola species. A result from one study therefore cannot automatically be transferred to every capsule.
Good tolerability in short studies is a reassuring sign. But it is not a free pass for months of self-medication.
Every substance you take regularly belongs on your medication list. Including the ones from the drugstore.
And now you know why I never assess roseroot without looking at your other medications.
What you can concretely do now
You do not have to order a capsule today. Today you can do something more important: take your exhaustion seriously and put it in context.
Three levers for the coming days
- Identify your type of exhaustion. For one week, note whether you feel more drained and low on drive, or more tense and wired. This distinction sets the direction.
- Have the causes checked before you dampen symptoms. Blood count, ferritin, thyroid, vitamin B12, vitamin D and inflammatory markers are a sensible start. Snoring, pauses in breathing or crashes after exertion should be mentioned.
- Discuss any plant with your doctor. Bring your medication list, especially if you take antidepressants, blood thinners or thyroid hormones.
If you recognize yourself in exhaustion after prolonged stress, also read my article on adaptogens in burnout and the idea of adrenal fatigue.
Frequently asked questions about Rhodiola rosea
What are the effects of Rhodiola rosea?
Rhodiola rosea, also called roseroot or golden root, is classified as an adaptogen. That means a plant that might support adaptation to strain. Controlled studies mainly suggest less exhaustion and better concentration under stress, for example in people with stress-related exhaustion syndrome. The evidence is, however, mixed. Two systematic reviews describe positive signals, but also methodological weaknesses in many studies. Roseroot can therefore be one building block, but it does not replace looking for the underlying cause.
Can roseroot help with burnout?
There are indications, but no proof. In a Swedish randomized trial of 60 people with stress-related exhaustion syndrome, exhaustion scores and attention improved more over 28 days with the extract SHR-5 than with placebo. An open study of 118 people with burnout symptoms showed improvements on many scales over 12 weeks, but had no placebo group. Burnout is a multilayered process. Roseroot can at most be one part of a larger plan.
What is the difference between rhodiola and ashwagandha?
Both are called adaptogens, but they pull in different directions. In traditional use, rhodiola was described as a mild stimulant, and studies have mainly examined it for tiredness, exhaustion and concentration. Ashwagandha has mainly been studied for stress, anxiety and sleep and is considered more calming. Put simply: rhodiola tends to fit the picture of drained and unfocused, ashwagandha the picture of tense and wired. The assessment should be individual.
Can you take rhodiola and ashwagandha together?
Controlled studies on the combination are lacking. Some products combine both plants because they have different profiles. But precisely because one tends to stimulate and the other tends to calm, a combination can also blur the picture, and afterwards you do not know which one did what. With ashwagandha, known risks for the thyroid and liver come on top. I would only consider a combination with medical supervision and after a clear assessment of your type of exhaustion.
When might you notice an effect from roseroot?
That depends on the question being asked. In a Russian study of 161 cadets, a measurable effect on mental performance under fatigue appeared after a single dose. In the open burnout study, some scores improved after just one week. Most controlled studies ran for 2 to 12 weeks. If nothing at all changes after a few weeks, that is important information and not a reason to increase the amount on your own.
What are the side effects of Rhodiola rosea?
In the controlled studies, mostly few and mild side effects were reported. In a US study on depression, 30 percent reported side effects with roseroot, 63 percent with sertraline and 17 percent with placebo. Because roseroot is considered more stimulating, restlessness or trouble falling asleep are conceivable if taken late in the day. Long-term data over many months are largely lacking. There are insufficient data for pregnancy and breastfeeding.
Are there interactions with medications?
Yes, that is possible. In a Norwegian study of 13 healthy people, a roseroot product taken for 14 days inhibited the liver enzyme CYP2C9 by about 21 percent. This enzyme breaks down drugs such as warfarin and phenytoin, which have a narrow therapeutic range. Other enzymes tested were not affected. If you take antidepressants, blood thinners, blood pressure or blood sugar medication, roseroot therefore belongs on your medication list and in a conversation with your doctor.
Can rhodiola replace antidepressants?
No. In a randomized trial from Pennsylvania with 57 people with mild to moderate depression, sertraline did better than roseroot at reducing symptoms, although the groups did not differ with statistical certainty. Roseroot, on the other hand, was better tolerated. Depression belongs in medical or psychotherapeutic care. You should never swap an ongoing antidepressant for a plant on your own.
Does rhodiola improve physical endurance?
A 2025 meta-analysis of 26 randomized trials with 668 healthy, mostly young participants found small improvements in maximal oxygen uptake, time to exhaustion and time-trial performance. Lactate and creatine kinase after exercise were also lower. Because of large differences between the studies, the authors urge cautious interpretation. These sports data cannot be transferred directly to people with pathological exhaustion.
Further reading in the ViveCura guide
These articles are directly connected to this topic.
Medicinal plants
Phytotherapy with evidence and limits
You are hereAdaptogens
What the term means and what it does not
Adaptogens in burnout
Stress axis instead of the adrenal myth
Ashwagandha effects
What winter cherry can do and for whom
Ashwagandha and cortisol
Stress, cortisol and intake
Ashwagandha side effects
Thyroid, liver and warning signs
Saffron
Mood and the state of the evidence
Valerian and passionflower
Herbal calming for sleep
Phytotherapy
How well herbal remedies are supported
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