Ashwagandha is one of the most widely discussed adaptogenic herbs. See what research says about its effects on stress, sleep, and safety.
What ashwagandha is and where its popularity came from
Ashwagandha is a plant traditionally used in India, primarily the root and its preparations. In modern times it has gained popularity as a supplement supporting stress resilience, recovery, and sleep. This is an important distinction, because many people associate it with infusions, just like herbal teas made from lemon balm or lavender. In fact, clinical studies most often concern specific extracts standardized to a defined withanolide content, not a simple infusion.
According to the NIH Office of Dietary Supplements and NCCIH, research on ashwagandha is promising, especially in the area of stress and sleep quality, but still does not justify exaggerated promises. This is very important. In practice, it means you can treat this herb as potential support, but not as a replacement for diagnosis, sleep hygiene, psychotherapy, or treatment recommended by a doctor.
Ashwagandha and stress: what research reviews say
The strongest area of scientific interest concerns stress and perceived tension. Systematic reviews and meta-analyses, including the 2021 review by Lopresti and co-authors, indicate that ashwagandha supplementation may be associated with a reduction in subjectively perceived stress and anxiety compared with placebo. In some studies, a decrease in cortisol levels was also observed, and cortisol is one of the markers of the stress response. However, two caveats need to be added.
First, many studies were relatively small, and their methodological quality was uneven. Second, different extracts, doses, and supplementation periods were used, so it is not possible to translate every publication into a simple piece of advice such as one dose for everyone. NIH emphasizes that the results are promising, but larger, better-designed studies are needed to precisely determine effectiveness and long-term safety.
In herbal practice, this only makes sense if you look at the bigger picture. Medicinal herbs can support everyday functioning, but stress does not come solely from a deficiency of one ingredient. If you sleep 5 hours, drink a lot of caffeine, eat irregularly, and have no time to rest, ashwagandha alone is unlikely to solve the problem. You can, however, treat it as one element of a plan, alongside movement, reducing evening stimulation, and simple calming habits.
Does ashwagandha help with sleep?
The second commonly discussed area is sleep. Some clinical studies suggest improved sleep quality, shorter time to fall asleep, or better recovery in people with tension and mild insomnia. One example is the 2019 study by Salve and co-authors, in which participants taking root extract showed beneficial changes in sleep
and anxiety compared with placebo.
Even here, though, it is worth keeping perspective. Ashwagandha does not work like a classic sleeping aid. It is not lemon balm or lavender in the form of an evening herbal tea meant to gently calm the bedtime ritual. Ashwagandha is more often described as support for regulating the stress response, and better sleep may be a secondary effect of reduced tension. That is precisely why some people feel a benefit while others do not notice much change.
If sleep is your priority, it is worth combining approaches. Herbs, herbal teas, regular bedtime hours, limiting blue light, and a lighter dinner often work better together than any single supplement. In this everyday puzzle, lemon balm and lavender still have their place, especially as part of an evening ritual, although their effects and usage profile differ from ashwagandha.
Tradition versus evidence: how to talk honestly about medicinal plants
In the world of herbs, it is easy to confuse a long history of use with hard clinical evidence. The fact that a plant has been used traditionally does not automatically mean that its effectiveness has been confirmed under modern research standards. On the other hand, a lack of large studies does not mean that tradition has no value at all. An honest approach means separating these two orders.
EMA, through the HMPC committee, analyzes the safety and traditional uses of herbal raw materials. Such documents are valuable because they show how institutions view herbal material, its history of use, and the available data. At the same time, EFSA assesses health claims very strictly. So if you see bold promises on a supplement package, it is worth staying alert. In the case of ashwagandha, marketing often runs ahead of the strength of the evidence.
This applies more broadly to the entire area of herbs and medicinal herbs. Lemon balm, lavender, chamomile, mint, or ashwagandha can be valuable elements of home phytotherapy, but responsibility means not attributing to them effects greater than those supported by research and safe practice.
Safety of ashwagandha use: what to keep in mind
According to NCCIH and NIH, ashwagandha is usually well tolerated with short-term use, but it is not without risk. Reported side effects include gastrointestinal discomfort, drowsiness, diarrhea, or nausea. Medical literature has also described cases of liver injury associated with supplements containing ashwagandha, although these are rare situations and require careful interpretation. Even so, the issue of safety must be taken seriously.
Particular caution should be exercised by people:
- who are pregnant or breastfeeding, because there are not enough safety data, and some sources advise against use,
- with thyroid disease, because ashwagandha may affect thyroid hormone levels,
- taking sedatives, sleeping pills, or anti-anxiety medications, because the effect may be intensified,
- with autoimmune diseases or those taking immunomodulating drugs,
- with liver disease or after episodes of liver injury.
If you have a chronic condition, take medications, or are planning long-term use, discuss it with a doctor or pharmacist. This is not a formality. With dietary supplements, the problem may be not only the herb itself, but also product quality, standardization, contaminants, or combining several ingredients in one capsule.
How to choose an ashwagandha product wisely
Unlike many plants that you can prepare as herbal teas, ashwagandha most often reaches you as a supplement. That is why it is worth reading labels more carefully than when buying dried lemon balm or lavender. Good selection practices are simple:
- Check whether the botanical name is given, namely Withania somnifera.
- See whether the manufacturer indicates the plant part, usually the root.
- Determine whether it is powder or a standardized extract, because that changes dose comparability.
- Avoid products with a very long list of additives if you do not know why they were used.
- Do not assume that a higher dose automatically means a better effect.
This matters because scientific studies concern specific preparations. If you buy a random product with an unclear composition, you cannot assume it will produce the same effect as a clinically studied preparation. In the case of medicinal herbs, raw material quality and standardization matter in real life.
Does ashwagandha fit into a daily herbal routine?
Yes, but only if you do not treat it as a magic shortcut. In practice, a layered approach works best. In the morning and during the day, you can support yourself with simple habits such as regular meals, less caffeine, and short screen breaks. In the evening, it is worth
reaching for proven rituals, such as herbal teas with lemon balm or lavender, a light dinner, and quiet winding down. Ashwagandha, if it is well tolerated and appropriate in your situation, can be an additional element of that plan.
This is also a good moment to remember that herbs are not limited to capsules. Herbs in the kitchen, such as mint, basil, thyme, or rosemary, will not replace clinical studies on stress, but they support everyday contact with plants, flavor, and a simpler, less processed diet. From a lifestyle perspective, that matters. Natural remedies work most sensibly when we do not detach them from the whole context of everyday life.
When ashwagandha may not be the best choice
There are situations in which it is better to look for another solution or first undergo diagnostic testing. If your sleep problems last for weeks, are accompanied by snoring, awakenings, palpitations, low mood, or chronic anxiety, supplementation alone may delay the help you need. The same applies to chronic fatigue, unexplained weight loss, or suspected thyroid problems. In such cases, medicinal herbs should not mask symptoms.
It is also worth being cautious if you are a person who reacts strongly even to mild calming agents. Some people feel calmer after ashwagandha, while others experience drowsiness or stomach discomfort. Starting with a sensible approach and observing your body's response is safer than blindly copying recommendations from the internet.
Conclusion: what can honestly be said
For now, this is what can be said: according to NIH, NCCIH, and the available research reviews, ashwagandha has promising but still limited confirmation of effects in the area of stress and sleep quality. For some people it may bring a noticeable benefit, especially when tension and poorer sleep are linked. It is not a solution for everyone, however, it does not replace treatment, and it requires caution in chronic illness, when taking medications, and during pregnancy.
If you like herbs, you can think of it as one tool rather than the whole toolbox. Lemon balm, lavender, other herbal teas, herbs in the kitchen, sleep hygiene, and reducing mental overload still matter enormously. That is what a mature approach to nature, tradition, and science looks like. With respect for plants, but without promises that research has not yet been able to support.
This material is educational in nature and does not replace advice from a doctor, pharmacist, or dietitian. If you have symptoms, chronic conditions, or are taking medications, consult a specialist before deciding to use supplements.
Sources
- NIH, Office of Dietary Supplements, Ashwagandha: Is it helpful for stress, anxiety, or sleep?, 2024, https://ods.od.nih.gov/factsheets/Ashwagandha-HealthProfessional/
- NCCIH, National Center for Complementary and Integrative Health, Ashwagandha, 2024, https://www.nccih.nih.gov/health/ashwagandha
- EMA, HMPC, Assessment report on Withania somnifera for traditional use, 2024
- Lopresti AL i wsp., systematic review and meta-analysis dotycząca stresu i lęku przy stosowaniu ashwagandhy, 2021
- Salve J i wsp., randomizowane badanie placebo dotyczące snu i lęku, 2019
FAQ
Does ashwagandha work right away?
Not always. In studies, benefits were usually assessed after several weeks of use. If you expect an immediate effect like a sleeping pill, you may be disappointed.
Can ashwagandha be combined with lemon balm or lavender?
Such combinations are often considered in home practice, because lemon balm and lavender more often appear as herbal teas supporting evening wind-down. However, if you take sedative medications, have chronic conditions, or are highly sensitive to calming agents, discuss it with a specialist.
Is ashwagandha safe for everyone?
No. Particular caution should be exercised by pregnant and breastfeeding women, people with thyroid disease, autoimmune diseases, liver problems, and those taking medications that affect the nervous system.
Is ashwagandha powder or extract better?
It depends on the goal and the product quality. Research more often concerns standardized extracts, so they are easier to compare with scientific publications. Powder on its own may have a different content of active compounds and is harder to compare with research data.
