Ashwagandha vs Rhodiola: What to Choose and for Whom

When ashwagandha and rhodiola sit on the shelf, the choice is often made at random. Meanwhile, these adaptogens suit different people and different situations. Our editorial team gathered practical selection criteria based on clinical research and safety profiles.

Where to start the choice

The question 'ashwagandha or rhodiola' makes sense only when it is clear what problem a person wants to solve. Both plants are adaptogens, but they work in different 'registers': ashwagandha more often helps to dampen excessive excitation, rhodiola to support energy when the resource is running out. So the starting point is an honest answer to the question of what exactly is getting in the way: anxiety or exhaustion.

The second question is the time of day and schedule. If a person finds it hard to fall asleep after an evening workout, it is more logical to look toward ashwagandha. But if you need to get through an intense working day or exam session without 'crashing' into fatigue after lunch, rhodiola performed better in studies.

The third is health status and medications. Some limitations make the choice obvious even before analyzing effectiveness: for example, thyroid or liver diseases argue against ashwagandha, while a tendency toward anxiety with insomnia argues against stimulating rhodiola.

Finally, it is worth remembering expectations. Adaptogens do not replace sleep, nutrition, and sensible load planning. Their effect in studies is moderate, and a supplement makes sense only when the basic factors are already in order.

Whom ashwagandha suits better

Ashwagandha is a logical choice for people whose stress manifests as tension, anxiety, and poor sleep. It is precisely on these measures that it has the most randomized placebo-controlled trials, in particular the works of Chandrasekhar (2012) and Lopresti (2019), where stress scale scores and cortisol levels decreased.

For those engaged in strength training, the data of Wankhede et al. (2015) are of interest: in beginners who took root extract for eight weeks, the gain in strength and muscle volume was greater than in the placebo group. In middle-aged overweight men, Lopresti et al. recorded a moderate increase in testosterone, although the clinical significance of this effect is limited.

Ashwagandha is also suitable for those ready for a gradual effect: in most studies the result was assessed after 6-8 weeks of daily use. Studies most often used 300 mg of root extract twice a day or 600 mg per day.

• chronic psycho-emotional stress and anxiety;
• problems falling asleep against a background of tension;
• strength training during a period of high load;
• absence of thyroid and liver diseases.

Whom rhodiola suits better

Rhodiola is an option for those whose main complaint is fatigue, reduced concentration, and a feeling of 'drained batteries' during a period of prolonged load. Classic studies of the SHR-5 extract were conducted precisely under such conditions: in physicians on night shifts (Darbinyan, 2000) and in people with stress-related fatigue (Olsson, 2009).

Rhodiola is often chosen by students during exam sessions, people with intense work schedules, and endurance athletes during periods of high-volume training. The data on physical endurance are contradictory, so you should not count on a boost in results, but it can reduce the subjective sense of fatigue.

In studies with standardized extracts, doses ranged from about 170 mg to 600 mg per day. Rhodiola is traditionally taken in the first half of the day so as not to disrupt sleep, and often in courses with breaks.

Rhodiola is less appropriate for people prone to anxiety, insomnia, or heightened excitability, as well as for those who already consume a lot of caffeine: the toning effects can add up.

Comparison table for choosing

To bring together what has been said, our editorial team compiled a table of typical scenarios. It is not a medical recommendation, but only reflects the conditions under which studies obtained the most convincing results for each plant.

As can be seen from the table, the plants rather complement each other than compete. That is why there are combined products on the market. However, combining two adaptogens complicates the assessment of what exactly is acting and what causes side effects.

If you are trying adaptogens for the first time, it is wiser to start with a single plant, evaluate the result over several weeks, and only then think about a combination.

Safety and product quality

When choosing between the two plants, safety often matters more than effectiveness. For ashwagandha, rare but serious cases of liver injury have been described (Björnsson et al., 2020), as well as an effect on thyroid hormones. It is contraindicated in pregnant women, and people with autoimmune diseases should discuss its use with a doctor.

Rhodiola less often causes serious reactions, but it can cause insomnia, irritability, and interact with antidepressants. The EMA does not recommend it for children, pregnant women, and breastfeeding women due to a lack of data.

Product quality is a separate topic. On the market there are 'rhodiolas' from other plant species without rosavins and ashwagandhas with negligible withanolide content. Look on the label for the name of the standardized extract and the percentage of marker compounds, as well as certificates from independent laboratories.

Athletes who undergo doping control should choose products verified by programs such as Informed Sport, since supplement contamination with prohibited substances is a documented problem (Geyer et al., 2008).

Editorial conclusions

Ashwagandha is the choice for those who want to reduce stress and anxiety, improve sleep, and perhaps slightly enhance training adaptations. Rhodiola is for those who need support for energy and concentration during periods of exhaustion.

The final decision depends on symptoms, schedule, health status, and the medications a person takes. If chronic conditions are present, the choice should be made together with a doctor.

Any adaptogen is an addition to sleep, nutrition, and competent load planning, not their replacement.

You will find more details on the differences between the plants in the material 'Ashwagandha or Rhodiola: What's the Difference'. We also recommend our articles on sleep hygiene for athletes and on cortisol and overtraining.

References

1. Chandrasekhar K, Kapoor J, Anishetty S. A prospective, randomized double-blind, placebo-controlled study of safety and efficacy of a high-concentration full-spectrum extract of ashwagandha root in reducing stress and anxiety in adults. Indian J Psychol Med. 2012;34(3):255–262.
2. Wankhede S, Langade D, Joshi K, Sinha SR, Bhattacharyya S. Examining the effect of Withania somnifera supplementation on muscle strength and recovery: a randomized controlled trial. J Int Soc Sports Nutr. 2015;12:43.
3. Lopresti AL, Drummond PD, Smith SJ. A randomized, double-blind, placebo-controlled, crossover study examining the hormonal and vitality effects of ashwagandha (Withania somnifera) in aging, overweight males. Am J Mens Health. 2019;13(2):1557988319835985.
4. 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):365–371.
5. 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):105–112.
6. Björnsson HK, Björnsson ES, Avula B, et al. Ashwagandha-induced liver injury: a case series from Iceland and the US Drug-Induced Liver Injury Network. Liver Int. 2020;40(4):825–829.
7. European Medicines Agency, Committee on Herbal Medicinal Products (HMPC). Community herbal monograph on Rhodiola rosea L., rhizoma et radix. London: EMA; 2012.
8. Geyer H, Parr MK, Koehler K, et al. Nutritional supplements cross-contaminated and faked with doping substances. J Mass Spectrom. 2008;43(7):892–902.