Ashwagandha labels range from 25 mg to well over 1,000 mg, and they are rarely measuring the same thing. Here is what the clinical trials actually used, goal by goal, and how to read the number on your bottle.
Written by Vita Globe Editorial Team | Reviewed against NIH guidance and randomized controlled trials
How much ashwagandha should you take per day?
There is no official recommended daily amount. Trials have used 240–1,250 mg a day of concentrated extract, with benefits more pronounced around 500–600 mg a day[1]. For stress, both 250 mg and 600 mg a day beat placebo in one trial, with larger effects at 600 mg[2]. For sleep, benefits were clearest at 600 mg a day or more[3].
Caveat: Those milligrams refer to specific standardized extracts. A different extract, ratio or whole-root powder at the same number of milligrams is not the same dose.
Sources: NIH ODS · Salve 2019 · Cheah 2021 · Verified 2026-09-27
In this article
Is there an official ashwagandha dose?
No. Ashwagandha is an herb, not a nutrient, so there is no Recommended Dietary Allowance and no established upper limit. What we have instead is the doses that researchers chose for their trials.
According to the NIH Office of Dietary Supplements, those ranged from 240 to 1,250 mg a day of extract, and up to 12,000 mg a day of whole root powder, with benefits appearing more pronounced at 500–600 mg a day[1].
What doses were used for each goal?
| Goal | Daily amount used in trials | How long |
|---|---|---|
| Everyday stress | 250 mg or 600 mg of root extract | 8 weeks |
| Stress (a different extract) | 240 mg of a root-and-leaf extract | 60 days |
| Sleep | 600 mg or more worked best in pooled trials | 8 weeks or more |
| Strength training | 600 mg (300 mg twice daily) | 8 weeks |
Stress. In an 8-week trial of 60 adults, 250 mg and 600 mg a day both lowered perceived stress and cortisol compared with placebo, and the effects were generally larger at 600 mg[2]. A separate trial used 240 mg a day of a different, more concentrated extract and also saw lower anxiety scores and morning cortisol than placebo[4]. Our deeper look at ashwagandha for stress walks through these studies.
Sleep. A meta-analysis of five trials found the sleep benefit was more prominent at 600 mg a day or more and after at least 8 weeks[3].
Exercise. In a trial of young men starting resistance training, 300 mg twice daily for 8 weeks improved strength gains compared with placebo[5].
Why can’t you compare doses across labels?
Because “ashwagandha 300 mg” can mean very different things:
- Standardized extracts are made to contain a set percentage of withanolides, the compounds researchers track. Most trial doses refer to these.
- Ratio extracts are labeled by how much root went in versus how much extract came out, such as 10:1 or 30:1. A ratio tells you concentration of raw material, not withanolide content.
- Whole root powder is unconcentrated, which is why trials using it gave several grams a day[1].
So a 25 mg serving of a 30:1 extract and a 600 mg serving of a standardized extract are not directly comparable. The “equivalent to 750 mg of whole root” line you may see on a ratio extract is simple arithmetic (25 × 30), not an equivalence to a trial dose. Our guide to ashwagandha extracts explains the labels in full.
How should you take it?
A few practical points from the research:
- Consistency matters more than clock time. Trials gave doses daily, often split into two servings. See the best time to take ashwagandha.
- Give it weeks, not days. Most trials measured results at 6–8 weeks[1].
- Check the whole label. Some ashwagandha products include other nutrients. Our Ashwagandha Gummies include 100 mcg of vitamin D per gummy, which equals the adult upper limit of 100 mcg (4,000 IU) a day[6]. If you also take a separate vitamin D supplement, add them up and talk to your provider.
The honest summary
- No official dose exists; trials mostly used 240–600 mg a day of standardized extract.
- Higher doses (around 600 mg) tended to show larger effects in head-to-head and pooled data.
- Milligrams are only comparable within the same type of extract.
- Start with the label directions and talk to your provider before going higher.
Our option
Vita Globe Ashwagandha Gummies
One tart-cherry gummy a day with 25 mg of a 30:1 ashwagandha root extract, plus vitamin D (100 mcg) and zinc (2 mg). Pectin-based, gluten-free and non-GMO, with no artificial flavors or colors, and tested by an independent third-party lab. Suggested use is one gummy daily. Its 25 mg of 30:1 extract is not the same as the 250–600 mg standardized-extract doses in trials, so we position it as a simple everyday routine for occasional stress rather than a clinical dose.*
Frequently asked questions
Is 600 mg of ashwagandha too much?
Six hundred milligrams a day of standardized root extract is the most commonly studied dose, and no serious side effects were reported in the pooled sleep trials, several of which used 600 mg a day[3]. That doesn’t make it right for everyone, so check with your provider, especially if you take medication.
Is 300 mg of ashwagandha enough?
It depends on the extract. A 250 mg daily dose beat placebo for stress in one trial, though 600 mg did better on most measures[2].
Should ashwagandha be taken once or twice a day?
Many trials split the dose, such as 300 mg twice daily[5]. Others used a single daily dose[4]. Follow the directions on your product.
Can you take too much ashwagandha?
Side effects such as stomach upset are possible[7], and there are rare reports of liver injury at doses of 450–1,350 mg a day[1]. Read Is Ashwagandha Safe? before increasing your intake.
How much ashwagandha is in a gummy?
It varies widely by brand, from low single digits to several hundred milligrams. Look for both the milligram amount and the extract type (standardized percentage or ratio).
Sources
- Office of Dietary Supplements, National Institutes of Health. Ashwagandha: Is it helpful for stress, anxiety, or sleep? Health Professional Fact Sheet. Updated May 2, 2025. https://ods.od.nih.gov/factsheets/Ashwagandha-HealthProfessional/
- Salve J, Pate S, Debnath K, Langade D. Adaptogenic and anxiolytic effects of ashwagandha root extract in healthy adults: a double-blind, randomized, placebo-controlled clinical study. Cureus. 2019;11(12):e6466. doi:10.7759/cureus.6466
- Cheah KL, Norhayati MN, Husniati Yaacob L, Abdul Rahman R. Effect of ashwagandha (Withania somnifera) extract on sleep: a systematic review and meta-analysis. PLoS One. 2021;16(9):e0257843. doi:10.1371/journal.pone.0257843
- Lopresti AL, Smith SJ, Malvi H, Kodgule R. An investigation into the stress-relieving and pharmacological actions of an ashwagandha (Withania somnifera) extract: a randomized, double-blind, placebo-controlled study. Medicine (Baltimore). 2019;98(37):e17186. doi:10.1097/MD.0000000000017186
- Wankhede S, Langade D, Joshi K, Sinha SR, Bhattacharyya S. Examining the effect of Withania somnifera supplementation on muscle strength and recovery: a randomized controlled trial. J Int Soc Sports Nutr. 2015;12:43. doi:10.1186/s12970-015-0104-9
- Office of Dietary Supplements, National Institutes of Health. Vitamin D: Health Professional Fact Sheet. https://ods.od.nih.gov/factsheets/VitaminD-HealthProfessional/
- National Center for Complementary and Integrative Health. Ashwagandha: Usefulness and Safety. Updated March 2023. https://www.nccih.nih.gov/health/ashwagandha
About the Vita Globe Editorial Team
The Vita Globe Editorial Team researches and writes our wellness content, working from peer-reviewed research, systematic reviews and guidance from bodies such as the NIH and the FDA. We cite our sources inline and update articles when the evidence changes.
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. This article is for informational purposes only and is not a substitute for medical advice. Talk to your healthcare provider before starting any new supplement, particularly if you are pregnant, nursing, taking medication, or caring for a child.
