Ashwagandha Benefits: A Natural Remedy for Stress and Anxiety
Updated: Sep 11
Written by Dr. Charles Drew, Lead Pharmaceutical Content Specialist & Clinical Drug Information Reviewer
Reviewed for medical accuracy under the Ivermectinkart Editorial Policy
Introduction
Ashwagandha (Withania somnifera) is a medicinal plant with a long history of use in Ayurveda and is now widely promoted as a supplement for managing stress and anxiety. Research into ashwagandha benefits suggests that certain preparations may help reduce perceived stress, while findings for anxiety are promising but not yet conclusive enough to consider ashwagandha a proven treatment. Clinical studies have also examined cortisol, sleep, mood, and other stress-related outcomes. However, different studies use different extracts and doses, and many trials are relatively small or short. Ashwagandha can also cause side effects, interact with medicines, and may be unsuitable during pregnancy or for people with certain medical conditions. Understanding both the potential benefits and the evidence gaps can help you make a more informed decision about this traditional herb.
What Is Ashwagandha and Why Is It Used for Stress?
Ashwagandha is an evergreen shrub traditionally used in Ayurvedic medicine and commonly sold today as a herbal supplement for stress, sleep, and general well-being. Its scientific name is Withania somnifera, and supplements may contain the root, leaf, or extracts made from these plant parts.
Ashwagandha contains naturally occurring compounds called withanolides. Researchers have studied these and other components to understand the plant's possible biological effects, but laboratory findings alone do not prove that a supplement will improve stress or anxiety in people.
Ashwagandha is also frequently described as an “adaptogen.” The term generally refers to substances proposed to help the body adapt to stress, but it should not be interpreted as proof that a product can prevent or treat a medical condition.
The NCCIH overview of ashwagandha's usefulness and safety notes that some ashwagandha preparations may help with stress and insomnia, while evidence concerning anxiety remains unclear.
What current evidence suggests about commonly discussed ashwagandha benefits
Potential benefit | What current evidence suggests | Important limitation |
Reduced perceived stress | Some human trials and reviews report improvement | Studies use different extracts, doses, and outcome measures |
Reduced anxiety symptoms | Some meta-analyses report improvement | Evidence remains inconsistent, and certainty has been limited |
Lower cortisol | Some trials and reviews report reductions | A change in cortisol does not automatically mean meaningful symptom improvement |
Better sleep | Some evidence suggests benefit for insomnia or sleep outcomes | Effects may depend on the preparation and population |
General mental well-being | Being investigated | Evidence is not strong enough for broad treatment claims |
What Does Research Say About Ashwagandha Benefits for Stress?
Clinical research suggests that some ashwagandha preparations may reduce perceived stress, but the evidence does not establish that every product will produce the same result. Differences between extracts, study populations, doses, treatment periods, and research methods make it difficult to define one universally effective regimen.
A 2024 systematic review and meta-analysis included nine randomized controlled trials involving 558 participants. Compared with placebo, ashwagandha formulations were associated with improvements in perceived stress scores, anxiety scores, and serum cortisol. The authors also emphasized the need for more information about long-term safety.
A newer 2026 systematic review and meta-analysis included 22 studies and also found improvements in stress and anxiety outcomes. However, its authors highlighted substantial variation across the available evidence and called for better-quality trials before firm clinical recommendations about dose and treatment duration can be made.
Not every analysis reaches identical conclusions. Another recent review found a significant reduction in cortisol but did not find a corresponding significant improvement in perceived stress, illustrating why individual biomarkers and people's actual symptoms should not be treated as interchangeable outcomes.
Ashwagandha has promising human research for stress, but “promising” is different from “proven.” Results from one standardized extract cannot automatically be applied to every powder, capsule, tea, or supplement labelled as ashwagandha.
Can Ashwagandha Help With Anxiety?
Ashwagandha may reduce anxiety symptoms in some people, but current evidence does not establish it as a replacement for standard assessment or treatment of an anxiety disorder. Some systematic reviews report meaningful improvements, while authoritative health guidance remains cautious because studies vary considerably in quality and design.
A 2022 systematic review and meta-analysis of 12 randomized trials involving 1,002 participants found reductions in reported anxiety and stress compared with placebo. Importantly, the researchers rated the certainty of evidence as low and concluded that further high-quality research was needed.
More recent reviews have continued to report potentially beneficial anxiety outcomes. However, differences in the formulations studied, relatively small trials, varying participant groups, and substantial differences between study results make broad conclusions difficult.
Is everyday stress the same as an anxiety disorder?
No. Feeling stressed or temporarily anxious in response to work, family responsibilities, finances, illness, or other pressures is not automatically an anxiety disorder.
An anxiety disorder involves symptoms that can be persistent, difficult to control, and disruptive to everyday life. If anxiety is significantly affecting your sleep, relationships, work, physical health, or normal activities, professional assessment is more appropriate than relying solely on a supplement.
How Might Ashwagandha Affect the Body's Stress Response?
Researchers are investigating whether ashwagandha influences biological systems involved in the stress response, but its mechanisms in humans are not completely established. One frequently studied outcome is cortisol, a hormone involved in the body's response to stress.
Cortisol is normal and necessary. Your body naturally produces it, and its concentration changes throughout the day. Therefore, the goal is not simply to make cortisol as low as possible.
Some clinical studies have found reductions in cortisol following ashwagandha supplementation. A 2024 meta-analysis, for example, reported improvements in serum cortisol as well as perceived stress measures, while another later analysis found reduced cortisol without a significant improvement in perceived stress.
This distinction matters because a laboratory measurement is a biological marker, not necessarily a direct measure of how someone feels or functions.
Does ashwagandha work immediately?
Ashwagandha should not be viewed as an immediate calming medicine. Trials investigating stress and anxiety have generally evaluated supplementation over a period of weeks rather than measuring it as an instant treatment for acute anxiety.
Research has also used different products and treatment periods. That makes it inappropriate to promise that everyone will notice an effect within a particular number of days.
How Much Ashwagandha Should You Take?
There is no single evidence-based dose that is appropriate for every person or every ashwagandha product. Clinical studies have used different doses and, importantly, different formulations and extract concentrations.
This makes milligram-to-milligram comparisons potentially misleading. A concentrated standardized extract is not necessarily equivalent to the same weight of ordinary root powder or another extract.
Research trials examining stress commonly use specific standardized preparations under controlled conditions. Those study doses should not automatically be treated as personal dosing instructions.
Practical dos and don'ts when considering an ashwagandha supplement
Do | Don't |
Check which plant part and extract the product contains | Assume all ashwagandha products are equivalent |
Discuss use with a healthcare professional if you take medicines or have health conditions | Copy a clinical-trial dose without considering the formulation |
Follow the labelled directions for an appropriately regulated product | Assume a larger amount will work better |
Stop and seek advice if concerning symptoms develop | Use supplements as a substitute for needed mental-health treatment |
Tell healthcare professionals about supplements you take | Assume “natural” automatically means risk-free |
Consider evidence for the specific reason you want to use it | Expect one supplement to resolve every cause of chronic stress |
In India, the Ministry of AYUSH has also distinguished between plant parts. Its advisory on the use of ashwagandha leaves states that the mature dried root is the part defined in the Ayurvedic Pharmacopoeia of India and advised against therapeutic use of ashwagandha leaves as ASU medicine because adequate supporting evidence was lacking.
What Are the Side Effects and Risks of Ashwagandha?
Ashwagandha can cause side effects and is not appropriate for everyone, despite being a plant-based product. Short-term use may be tolerated by many adults, but information about long-term safety remains limited.
According to the U.S. National Center for Complementary and Integrative Health, reported side effects can include:
Drowsiness
Stomach upset
Diarrhea
Vomiting
Rare cases of liver injury associated with ashwagandha supplements have also been reported.
Who should be particularly cautious?
The NCCIH ashwagandha safety guidance advises avoiding ashwagandha during pregnancy and breastfeeding. It also states that ashwagandha is not recommended for people who are about to have surgery or those with autoimmune or thyroid disorders.
Ashwagandha may also interact with medicines used for diabetes and high blood pressure, immunosuppressants, sedatives, anti-seizure medicines, and thyroid hormone medicines. People with hormone-sensitive prostate cancer are also advised to avoid it because ashwagandha may affect testosterone.
These cautions are particularly important if you take several medicines or have an ongoing medical condition.
When Should You Seek Medical Advice for Stress or Anxiety?
Stress is a normal part of life, but persistent or severe symptoms deserve attention. Speak with a qualified healthcare or mental-health professional if anxiety is difficult to control, repeatedly interferes with sleep or daily activities, causes significant distress, or continues despite attempts to manage it.
Seek urgent medical help if you experience severe mental-health symptoms, feel unable to keep yourself safe, or have thoughts of self-harm or suicide. Supplements should not delay urgent assessment or replace evidence-based treatment when it is needed.
You should also seek medical advice if you develop possible signs of liver problems while taking a supplement, such as yellowing of the skin or eyes, unusually dark urine, persistent nausea or vomiting, severe abdominal discomfort, or unusual fatigue.
Conclusion
Current research into ashwagandha benefits suggests that certain preparations may help some adults manage stress, with emerging but less certain evidence for anxiety symptoms. However, ashwagandha is not a proven cure for anxiety, products vary considerably, and questions remain about optimal formulations, dosing, and long-term safety.
If you are considering ashwagandha, especially alongside prescription medicines or when managing a thyroid, autoimmune, liver, or mental-health condition, discuss it with a qualified healthcare professional. A supplement can sometimes complement a broader approach to well-being, but persistent or severe anxiety deserves proper assessment and evidence-based care.
Frequently Asked Questions
1. Does ashwagandha really reduce stress?
Some randomized trials and systematic reviews suggest that certain ashwagandha preparations can reduce perceived stress in adults. However, studies vary in quality, formulation, and duration. The evidence is encouraging, but it does not guarantee that every ashwagandha product will work for everyone.
2. Is ashwagandha proven to treat anxiety?
No, ashwagandha should not be considered a proven replacement for established anxiety treatments. Some studies report reduced anxiety symptoms, but uncertainty and variation between trials remain. Persistent or disruptive anxiety should be assessed by a qualified healthcare or mental-health professional.
3. How long does ashwagandha take to work for stress?
There is no reliable timeframe that applies to everyone. Clinical trials generally study effects over several weeks using particular preparations rather than demonstrating an immediate calming effect. Individual results may differ, and a lack of improvement should not be addressed simply by increasing the dose.
4. Can I take ashwagandha every day?
Some studies have evaluated daily short-term use, but long-term safety is not well established. NCCIH states that ashwagandha may be safe for up to about three months for some people. Whether daily use is appropriate depends on your health, medicines, and product.
5. Can ashwagandha interact with prescription medicines?
Yes. Potential interactions include medicines for diabetes and high blood pressure, sedatives, immunosuppressants, anti-seizure medicines, and thyroid hormone medicines. If you use prescription medication, discuss ashwagandha with a healthcare professional or pharmacist before adding it to your routine.
6. Who should avoid ashwagandha?
Ashwagandha should be avoided during pregnancy and breastfeeding according to NCCIH guidance. It is also not recommended for certain people with thyroid or autoimmune disorders or those approaching surgery. Other medical conditions and medicines can affect safety, so individual professional advice is important.
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