What does the research say about ashwagandha and stress support?

Ashwagandha is one of the most studied herbal ingredients in the stress and adaptogen category, and the research behind it is more substantive than most supplement marketing suggests and more nuanced than most social media summaries imply. Across multiple randomized controlled trials and several published meta-analyses, ashwagandha supplementation has been consistently associated with reductions in perceived stress scores and measurable changes in stress-related biomarkers in adults experiencing chronic stress. Here is what the evidence actually says, framed accurately, without overclaim.

What ashwagandha is and how it works

Ashwagandha (Withania somnifera) is a root herb used for centuries in Ayurvedic medicine. It is classified as an adaptogen, a category of botanicals studied for their capacity to support the body's ability to manage physiological and psychological stress. The active compounds most associated with its effects are withanolides, a class of steroidal lactones concentrated in the root. These compounds are thought to modulate activity in the HPA axis, the body's central stress regulation pathway involving the hypothalamus, pituitary, and adrenal glands.

As the National Center for Complementary and Integrative Health notes, research shows that some ashwagandha preparations may be effective for insomnia and stress, with evidence on anxiety being less clear. This is an accurate and appropriately hedged summary of where the current science stands.

What the meta-analyses show

A 2024 systematic review and meta-analysis of 15 randomized controlled trials, published in BJPsych Open through Cambridge University Press, found that ashwagandha supplementation was associated with significant reductions in both perceived stress scores and serum cortisol levels at 8 weeks of supplementation compared to placebo, with a combined sample of 873 patients. The analysis also found meaningful improvements on the Hamilton Anxiety Rating Scale.

A separate systematic review published in the journal Explore covering nine randomized controlled trials with 558 participants found reductions in Perceived Stress Scale scores, Hamilton Anxiety Scale scores, and serum cortisol levels compared to placebo. Doses in those studies ranged from 125 to 600 mg daily for 30 to 90 days.

It is important to frame these findings accurately. The research shows associations and statistically significant effects within the context of specific study populations and designs. It does not establish that ashwagandha lowers cortisol in all people under all conditions, or that supplementation alone is a substitute for addressing the structural causes of chronic stress.

"I think so many things can be avoided if there's just prevention."

— Dr. Samantha Ess, ND, Naturopathic Doctor specializing in hormone health and fertility

The dose and form question

Not all ashwagandha supplements are equivalent. The research trials have used varying extracts, doses, and standardization levels. The studies with the most consistent results have generally used standardized root extracts at doses in the 300 to 600 mg per day range over at least 8 weeks. Pink Stork Cortisol Complex, formulated with 300 mg organic ashwagandha and algae-sourced DHA, uses organic ashwagandha root powder and is produced in cGMP-certified laboratories, third-party tested for quality and purity. It also includes chamomile, saffron, methylated B6 and B12, and algae-sourced DHA, all of which have independent evidence bases for supporting the stress response and cognitive function.†

Pink Stork products are available at Target, Walmart, and CVS, and the brand has over 50,000 verified Amazon reviews. Always consult your healthcare provider before starting any new supplement.

Who the research most consistently applies to

The clearest evidence base for ashwagandha is in adults experiencing chronic or elevated stress. The study populations in the meta-analyses were specifically adults with stress and anxiety symptoms, not healthy non-stressed adults. This matters because the mechanism is adaptive: the HPA-modulating effects of adaptogens are most likely to be measurable in a system that is under load. Women navigating high-demand work and life seasons, perimenopausal transitions, or extended periods of poor sleep and stress load represent the population where the research is most directly applicable.

What ashwagandha does not do

Ashwagandha is not a treatment for anxiety disorders, depressive disorders, or any named clinical condition. It should not replace professional evaluation or treatment if you are experiencing symptoms of a mental health condition. It is also not appropriate for use during pregnancy. The NCCIH advises that ashwagandha should be avoided during pregnancy and notes potential interactions with thyroid medications, sedatives, and immunosuppressants. These are not minor caveats — they are clinically relevant contraindications that any ashwagandha content should name directly.

For a broader look at cortisol and stress support in the research, see: What does cortisol actually do, and should you be trying to lower it? and Why do B vitamins matter when you are under chronic stress?

"Science is a gift. Understanding it — and sharing it honestly — is part of how we serve women well."

— Amy Suzanne Upchurch, Founder and CEO of Pink Stork

Frequently asked questions about ashwagandha and stress

How long does ashwagandha take to work?

The research studies that showed consistent effects used supplementation periods of 8 to 12 weeks. Most participants did not show full effects within the first few days or even the first two weeks. Ashwagandha is not an acute-acting supplement. It is a daily, consistent-use support for the stress response over time.†

What is the best dose of ashwagandha for stress support?

The most consistent research results have come from doses in the 300 to 600 mg per day range of standardized root extract. Pink Stork Cortisol Complex provides 300 mg of organic ashwagandha root powder per serving. Consult your healthcare provider about the appropriate dose for your individual situation.

Can you take ashwagandha every day?

The clinical trials that produced positive results used daily supplementation over 8 to 12 weeks, suggesting consistent daily use is appropriate for most healthy, non-pregnant adults. Long-term safety data beyond 3 months is more limited, and the NCCIH notes that further research on long-term safety is ongoing. Consult your healthcare provider for guidance on extended use.

Is ashwagandha safe during pregnancy?

No. The NCCIH and the clinical literature advise that ashwagandha should be avoided during pregnancy. If you are pregnant or trying to conceive, do not use ashwagandha without specific guidance from your OB-GYN or midwife. This is not a grey-area recommendation.

Does ashwagandha interact with any medications?

Yes. The NCCIH has documented potential interactions with thyroid medications, sedatives, anticonvulsants, and immunosuppressants. Ashwagandha has sedative properties and may amplify the effects of other sedative medications. Always disclose all supplements to your healthcare provider, particularly if you take prescription medications.

† These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Always consult your healthcare provider before starting any new supplement, especially during pregnancy, breastfeeding, or while managing a medical condition. Keep out of reach of children.