Ashwagandha is often sold as an "adaptogen," which is a substance that is supposed to help the body better handle stress. Studies have indicated that some extracts of ashwagandha may be able to lower cortisol, a hormone involved in the body's reaction to stress. However, this doesn't mean ashwagandha just "blocks cortisol" or takes away stress.

Cortisol is a normal and necessary hormone, it is the stress hormone. The goal is not to eliminate it, but to maintain a more appropriate stress response.

Understanding Cortisol

The adrenal glands make cortisol, and its release is controlled by the hypothalamic-pituitary-adrenal, or HPA, axis.

When the brain detects a stressor, the HPA axis begins a cascade of hormonal signals, ultimately resulting in an increase in cortisol production. Cortisol helps the body mobilise energy and react to challenges.

This system helps with short term stress. Problems happen when stress is chronic and accompanied by poor sleep, inactivity, poor nutrition or other health problems.

This is why you should not automatically take the phrase “high cortisol” as a diagnosis. Cortisol levels vary throughout the day and a laboratory result must be interpreted in the clinical context.

How Ashwagandha May Influence Stress

Ashwagandha has bioactive compounds called withanolides. Researchers think the compounds may impact pathways involved in the body’s stress response.

The exact mechanism is under investigation. It’s more accurate to say that ashwagandha seems to modulate stress-related physiological responses than to say it just lowers cortisol in everyone.

A systematic review and meta-analysis of randomised controlled trials in 2025 found a statistically significant reduction in cortisol, but no significant improvement in perceived stress on the Perceived Stress Scale. That's an important distinction: a biological marker and how somebody feels aren't always the same.

A separate 2026 meta-analysis of 22 randomised controlled trials indicated possible improvements in stress, anxiety and depression, but the authors stressed the need for more quality research.

What Are the Potential Benefits?

Research has been mostly on ashwagandha for stress, anxiety and sleep.

People with chronic psychological stress may complain of feeling tired, having difficulty relaxing, sleeping poorly and having difficulty concentrating. If ashwagandha is beneficial for a given person’s stress-related symptoms, sleep and daytime function improvement may be an indirect effect.

But it should not be presented as a treatment for depression, anxiety disorders or other mental health conditions.

What About Cortisol and Weight Gain?

Sometimes, people online say that cortisol is what prevents you from losing belly fat. This is a very simple explanation.

Energy intake, physical activity, sleep, genetics, medications, endocrine disorders and many other factors affect body weight.

Taking ashwagandha isn’t a substitute for a calorie-appropriate diet or regular activity, but reducing stress might help promote healthier eating and sleeping habits.

How to Use Ashwagandha Responsibly

However, a single dosage has not been uniformly established in clinical trials due to the use of different extracts, concentrations and formulations.

The NIH says some of the research on the benefits for stress used about 500 to 600 milligrammes a day, but sleep studies have used a variety of formulations and doses. It is therefore easy to be deceived by the comparison of milligrammes of different goods without regard to the extract and the standardisation measures.

Herbiotics Somnirol

Each of Herbiotics Somnirol Ashwagandha 400mg Capsules contains 400mg of Withania somnifera extract. Herbiotics sells the product for stress support, vitality and general wellness and recommends taking one capsule per day as per the product directions.

For consumers looking at ashwagandha, the trick isn’t simply to look for the highest milligramme count. The type of extract, standardisation, product quality, dosage and individual health status all play a role.

Who Should Be Careful With Ashwagandha?

Ashwagandha isn’t for everyone.

The NIH says these drugs can interact with thyroid medications, diabetes medications, blood-pressure medications, sedatives and immunosuppressive medications. There are also concerns about possible liver injury and thyroid effects. This is particularly relevant for conditions like pregnancy and lactation.

If you have ongoing anxiety, depression, unexplained fatigue, major sleep issues or symptoms indicative of an endocrine disorder, do not depend on a supplement alone.

FAQs 

1. Can Ashwagandha reduce cortisol?

Some ashwagandha preparations can lower cortisol, according to clinical studies, but the effect is not guarantyd and doesn't mean cortisol should be eliminated.

2. How long does it take for ashwagandha to work for stress?

Most clinical trials look at effects over weeks, not after a single dose.

3. Is ashwagandha a cure for anxiety?

No. It can help some people with stress and anxiety symptoms, but it is not a substitute for professional treatment of an anxiety disorder.

4. Can Ashwagandha Help You Sleep?

Small clinical trials have indicated some benefit for sleep quality, duration and efficiency, especially in people who have trouble sleeping.

5. Is ashwagandha safe for women?

Some clinical studies do include women, but personal safety considerations are still important, especially during pregnancy, breastfeeding and when taking medication.

Conclusion

The ashwagandha plant doesn’t just work by blocking the production of cortisol. The research that is out now suggests that it might have an effect on the body’s stress response and reduce cortisol levels in some people and also has the potential to improve outcomes associated with stress and sleep. The research is promising but not definitive, and the differences between products matter.

Summary

Ashwagandha might assist some people in managing parts of the stress response and lowering cortisol. It should not be considered a cure for stress, anxiety or hormonal disorders of a chronic nature, but rather supportive nutrition.

References: 

National Institutes of Health, Office of Dietary Supplements. (2023). Ashwagandha: Is it helpful for stress, anxiety, or sleep? NIH Office of Dietary Supplements. https://ods.od.nih.gov/factsheets/ashwagandha-Consumer/

National Institutes of Health, Office of Dietary Supplements. (2024). Ashwagandha: Is it helpful for stress, anxiety, or sleep? Health Professional Fact Sheet. https://ods.od.nih.gov/factsheets/Ashwagandha-HealthProfessional/

Herbiotics. (n.d.). Somnirol Ashwagandha 400mg Capsules. Herbiotics Pakistan. https://herbiotics.com.pk/products/somnirol-ashwagandha-400mg-capsules

Lopresti, A. L., Smith, S. J., Metse, A. P., et al. (2019). Effects of an ashwagandha extract on stress and anxiety: A randomized, double-blind, placebo-controlled study. Medicine, 98(37), e17186. https://doi.org/10.1097/MD.0000000000017186

Chandrasekhar, K., Kapoor, J., & Anishetty, S. (2012). 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 Journal of Psychological Medicine, 34(3), 255–262. https://doi.org/10.4103/0253-7176.106022