Ashwagandha shows up in everything from sleep gummies to gym stacks. Some of those uses have decent human research behind them. Others are running on very little. Here is the honest breakdown.
Written by Vita Globe Editorial Team | Reviewed against NIH guidance, meta-analyses and randomized controlled trials
What is ashwagandha good for?
The best-supported use is everyday stress: several randomized trials and a meta-analysis found lower stress and anxiety scores than placebo[1][2]. Sleep is next, with a small but real benefit in pooled trials[3]. Evidence for strength training, testosterone, menopause symptoms and memory is thinner, based on fewer and smaller studies[4].
Caveat: Most trials used 240–600 mg a day of concentrated extracts for 6–12 weeks, so results don’t automatically apply to every ashwagandha product or dose.
Sources: Akhgarjand 2022 · NIH ODS · Cheah 2021 · NCCIH · Verified 2026-09-27
In this article
What is ashwagandha, exactly?
Ashwagandha (Withania somnifera) is a shrub whose root has been used in Ayurvedic practice for centuries. Today it is usually sold as a root extract and grouped with “adaptogens,” herbs said to help the body handle stress. If that term is new, our explainer on what adaptogens are covers it.
The key thing to know before reading any list of benefits: most of the research tests specific concentrated extracts at specific doses. The NIH Office of Dietary Supplements notes that trials have used anywhere from 240 to 1,250 mg a day of extract, and that benefits looked more pronounced around 500–600 mg a day[2].
Which 7 uses have research behind them?
Here is each common use, with a plain-English read on the evidence.
| Use | What studies found | Strength of evidence |
|---|---|---|
| 1. Everyday stress | Lower stress scores and, in several trials, lower cortisol vs. placebo | Moderate |
| 2. Feelings of anxiety | Lower anxiety scores in pooled trials; NCCIH calls the anxiety evidence unclear | Moderate to mixed |
| 3. Sleep | Small but significant improvement, mostly in people with insomnia | Moderate |
| 4. Strength and exercise | Improvements in strength and fitness in small trials | Limited |
| 5. Testosterone and sperm quality | Some increases after 2–4 months in small trials | Limited |
| 6. Menopause symptoms | One randomized trial in perimenopausal women | Early |
| 7. Memory and focus | Not enough evidence to say | Weak |
Where is the evidence strongest?
1. Stress. This is ashwagandha’s home turf. In one frequently cited trial, adults with chronic stress who took a root extract for 60 days reported lower stress than those on placebo and had lower serum cortisol[5]. A 2022 meta-analysis of randomized trials concluded that ashwagandha reduced both stress and anxiety scores compared with placebo[1]. We go deeper in Ashwagandha for Stress: What the Research Actually Shows.
2. Anxiety. The same meta-analysis found lower anxiety scores[1], but the National Center for Complementary and Integrative Health describes the evidence on anxiety as unclear[4]. Translation: promising for everyday worry, not a substitute for care for an anxiety disorder.
3. Sleep. A 2021 meta-analysis of five trials (400 people) found a “small but significant” effect on overall sleep. The benefit was clearest in adults with insomnia, at 600 mg a day or more, and after at least eight weeks[3].
Which uses have weaker evidence?
4. Strength and fitness. A 2021 systematic review found that ashwagandha was associated with better strength, power and cardiorespiratory fitness than placebo[6]. The catch: the trials were small and mostly short. See what ashwagandha does for men for the details of the best-known strength trial.
5. Testosterone and sperm quality. NCCIH says there is “limited evidence” that taking ashwagandha for 2 to 4 months may increase testosterone levels and sperm quality[4]. Interesting, but not settled.
6. Menopause symptoms. In a randomized trial of women in perimenopause, 8 weeks of root extract reduced menopause symptom scores more than placebo[7]. One trial is a starting point, not proof, and NCCIH lists menopause among the uses without enough evidence yet[4].
7. Memory and focus. This one gets marketed a lot. NCCIH says there isn’t enough evidence to know whether ashwagandha helps with cognitive function[4].
The honest summary
- Best evidence: everyday stress, followed by sleep.
- Promising but thin: strength, testosterone, sperm quality, menopause symptoms.
- Not enough evidence yet: memory and focus.
- Almost all results come from concentrated extracts at 240–600 mg a day, taken for weeks.
Who should skip ashwagandha?
“Good for” also means knowing who it isn’t for. NCCIH advises avoiding ashwagandha during pregnancy and breastfeeding, and says it isn’t recommended for people with autoimmune or thyroid conditions, people about to have surgery, or men with hormone-sensitive prostate cancer[4]. The NIH also notes rare reports of liver injury and possible interactions with diabetes, blood pressure, immune-suppressing and sedative medications[2]. Our full guide to ashwagandha safety covers this in more detail.
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. That is a much lower amount than the 240–600 mg of standardized extract used in most trials, so think of it as a gentle daily habit for occasional stress, not a replica of a study dose.*
Frequently asked questions
What does ashwagandha do to your body?
Researchers think it may influence the body’s stress-response system. In several trials, people taking it had lower cortisol, a stress hormone, than people on placebo[5][2].
Is ashwagandha good for weight loss?
There isn’t good evidence that ashwagandha causes weight loss. Research has focused mainly on stress, sleep and exercise performance.
Can you take ashwagandha every day?
Trials typically gave it daily for 6–12 weeks[2]. Longer-term safety data are limited, so it’s sensible to check in with your doctor if you plan to take it for months. See Is Ashwagandha Safe?.
Does ashwagandha help with anxiety?
Pooled trials found lower anxiety scores than placebo[1], but NCCIH calls the evidence unclear[4]. If anxiety affects your daily life, talk with a healthcare provider.
How long does ashwagandha take to work?
Most trials measured results after 6–8 weeks, and sleep benefits were clearer after 8 weeks or more[3]. More in How Long Does Ashwagandha Take to Work?.
Sources
- Akhgarjand C, Asoudeh F, Bagheri A, et al. Does ashwagandha supplementation have a beneficial effect on the management of anxiety and stress? A systematic review and meta-analysis of randomized controlled trials. Phytother Res. 2022;36(11):4115-4124. doi:10.1002/ptr.7598
- 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/
- 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
- National Center for Complementary and Integrative Health. Ashwagandha: Usefulness and Safety. Updated March 2023. https://www.nccih.nih.gov/health/ashwagandha
- Chandrasekhar K, Kapoor J, Anishetty S. 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 J Psychol Med. 2012;34(3):255-262. doi:10.4103/0253-7176.106022
- Bonilla DA, Moreno Y, Gho C, Petro JL, Odriozola-Martínez A, Kreider RB. Effects of ashwagandha (Withania somnifera) on physical performance: systematic review and Bayesian meta-analysis. J Funct Morphol Kinesiol. 2021;6(1):20. doi:10.3390/jfmk6010020
- Gopal S, Ajgaonkar A, Kanchi P, et al. Effect of an ashwagandha (Withania somnifera) root extract on climacteric symptoms in women during perimenopause: a randomized, double-blind, placebo-controlled study. J Obstet Gynaecol Res. 2021;47(12):4414-4425. doi:10.1111/jog.15030
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.
