· By Amy Suzanne Upchurch, Founder + CEO of Pink Stork, Certified Health Coach, INHC
How much ashwagandha do you need to support a healthy stress response?
Most of the research showing meaningful reductions in perceived stress and measured cortisol used daily doses of standardized ashwagandha root extract in the range of roughly 250 to 600 mg, taken consistently for at least four to eight weeks. Before you buy the cheapest bottle on the shelf, it is worth knowing what the actual studies used, since a lot of products on the market do not disclose a comparable dose.
What a large 2025 meta-analysis actually found
A systematic review and meta-analysis published in BJPsych Open pooled 15 randomized controlled trials with 873 total participants and found that ashwagandha supplementation was associated with a statistically significant reduction in anxiety scores, perceived stress scores, and measured cortisol levels compared with placebo after 8 weeks of treatment1. It is important to be precise here: this is research on the ingredient across multiple studies, not a claim that any single product lowers your cortisol. Individual results vary, and this research reflects group averages, not a guarantee for any one person.
A separate randomized, placebo-controlled trial found that ashwagandha root extract reduced measured serum cortisol at both 250 mg per day and 600 mg per day, with participants also reporting improved sleep quality compared with placebo2. Doses in this range, backed by a standardized extract, come up repeatedly across the clinical literature.
What to actually look for on a label
- A standardized root extract, not just "ashwagandha powder" with no extraction ratio disclosed
- A stated daily dose in the range studies have used, generally several hundred milligrams
- Third-party testing, since ashwagandha and other botanicals can vary in quality between manufacturers
The National Center for Complementary and Integrative Health notes that some ashwagandha preparations may be effective for insomnia and stress support, while also cautioning that long-term safety data is still limited and that people should talk with a healthcare provider before starting it, particularly people who are pregnant3. Ashwagandha has also been associated with rare cases of liver injury, which is another reason sourcing and dose transparency matter4.
What a credibly dosed formula looks like
Cortisol Complex, formulated with 300 mg organic ashwagandha and algae-sourced DHA, sits within the range studied in clinical research for stress support.† The formula also includes a full B-vitamin complex and chamomile, since ashwagandha research suggests it works best as part of a consistent daily routine rather than an occasional add-on. For the physiology behind why consistency matters more for women specifically, see our guide on why stress affects women differently than men.
"We tell women to trust their gut on wellness products, but you also deserve to know the actual research behind an ingredient, not just the marketing claim on the front of the bottle," says Amy Suzanne Upchurch, Founder and CEO of Pink Stork.
For the full picture on what causes elevated stress hormones in the first place, start with our pillar guide on what causes high cortisol in women.
Frequently asked questions
What dose of ashwagandha do clinical studies actually use?
Most trials showing benefits for stress and cortisol used daily doses in the range of roughly 250 to 600 mg of standardized root extract, taken for at least four to eight weeks1,2.
Does ashwagandha lower cortisol in every study?
A 2025 meta-analysis of 15 trials found a statistically significant reduction in measured cortisol compared with placebo at 8 weeks, though results vary between individual studies and participants1.
Is ashwagandha safe for everyone?
Not necessarily. NCCIH notes long-term safety data is limited, and ashwagandha has been linked to rare cases of liver injury3,4. Talk with your healthcare provider before starting it, especially if you are pregnant, breastfeeding, or managing a medical condition.
How much ashwagandha is in Cortisol Complex?
Cortisol Complex contains 300 mg of organic ashwagandha root, within the range studied in published clinical research.†
How long before I'd notice a difference?
Most of the research reviewed used at least 4 to 8 weeks of consistent daily use before measuring outcomes, so a single dose is unlikely to reflect what the research actually studied.
† 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.
