Ashwagandha is not a same-day supplement. In clinical trials, researchers typically waited weeks before measuring results. Here is what a realistic timeline looks like for different goals.
Written by Vita Globe Editorial Team | Reviewed against NIH guidance, a meta-analysis and randomized controlled trials
How long does it take for ashwagandha to work?
Expect weeks, not days. Most stress trials measured results after 6–8 weeks[1], and sleep benefits were clearer after 8 weeks or more[2]. Some trials reported earlier changes; one perimenopause trial saw symptom improvements by week 4[3].
Caveat: Timelines come from trials using 250–600 mg a day of standardized extracts. Lower doses or different extracts may behave differently.
Sources: NIH ODS · Cheah 2021 · Gopal 2021 · Verified 2026-09-27
In this article
What does the research timeline look like?
| Goal | When trials measured results |
|---|---|
| Everyday stress | 8 weeks (60 days) |
| Sleep | 6–12 weeks; clearest at 8+ weeks |
| Insomnia | 10 weeks |
| Perimenopause symptoms | Changes by 4 weeks; measured at 8 weeks |
The NIH Office of Dietary Supplements notes that stress trials generally lasted 6–8 weeks, and sleep studies ranged from 6 to 12 weeks[1].
How long does ashwagandha take to work for stress?
In the classic stress trial, adults took 300 mg of root extract twice daily and were assessed at 60 days, when they reported lower stress and had lower cortisol than the placebo group[4]. Another trial gave 250 mg or 600 mg a day and measured at 8 weeks, with both doses outperforming placebo on perceived stress[5].
These trials checked in at set points, so they don’t tell us exactly when people first noticed a difference. What they do tell us is that 8 weeks of consistent use is a fair trial period. More in Ashwagandha for Stress.
How long does ashwagandha take to work for sleep?
Longer than people often expect. A meta-analysis found the sleep benefit was more prominent when treatment lasted at least 8 weeks[2]. In a 10-week insomnia trial, people taking root extract fell asleep somewhat faster and slept more efficiently than those on placebo by the end of the study[6].
What can make ashwagandha seem slow to work?
If you’re a few weeks in and not noticing much, a few things could be going on:
- The dose is lower than studied. Trials mostly used roughly 240–600 mg a day of concentrated extract[1]. A lower amount, or a different kind of extract, may take longer or have a smaller effect. Our guide to ashwagandha extracts explains why milligrams aren’t always comparable.
- Doses are being missed. Trials gave it every day. Skipping days makes it hard to tell whether anything is working.
- The expectation is off. In trials, benefits were modest. Ashwagandha tends to take the edge off everyday stress rather than transform how you feel.
- Something else is driving the problem. Poor sleep habits, caffeine late in the day, or an underlying health condition won’t be solved by a supplement. If stress or sleep problems are affecting your daily life, talk to a healthcare provider.
It can help to jot down a simple weekly note, such as how you slept and how stressed you felt on a 1–10 scale, so you have something concrete to look back on at week 8.
When should you reassess?
A practical approach:
- Weeks 1–2: Watch for side effects such as stomach upset or drowsiness. Don’t expect big changes yet.
- Weeks 4–8: This is the window in which trials began reporting differences from placebo.
- Week 8: Take stock. If you notice nothing, the dose or extract may not suit you, or it may simply not work for you. Our dosage guide explains why doses vary so much.
- Beyond 3 months: Long-term safety data are limited, so it’s worth a check-in with your provider[1].
The honest summary
- Think in weeks: 6–8 for stress, 8 or more for sleep.
- At least one trial reported changes by week 4.
- Consistency matters; skipping days makes it hard to judge.
- If nothing changes by about 8 weeks, reassess with your provider.
Our option
Vita Globe Ashwagandha 25mg Gummies (60 count)
25 mg of ashwagandha in a naturally flavored tart-cherry gummy, one a day, in a 60-count bottle. Tested by an independent third-party lab. A 60-count bottle covers two months of one-a-day use, which lines up with how long trials ran. Keep in mind that 25 mg is a lower amount than the extracts used in those studies.*
Frequently asked questions
Can you feel ashwagandha right away?
Some people report feeling calmer or drowsy soon after starting, but trials measured benefits after weeks of daily use[1].
How long should you take ashwagandha before a break?
Most trials lasted 12 weeks or less, and long-term safety data are limited[2]. Talk with your provider about how long is right for you.
Does ashwagandha work faster at higher doses?
Higher doses (600 mg a day) generally showed larger effects than 250 mg at the same time point[5], but that doesn’t mean faster. Don’t increase your dose without guidance.
Why am I not feeling ashwagandha?
Common reasons: it’s been under 6–8 weeks, the dose or extract differs from what was studied, or you’re not taking it daily. See Does Ashwagandha Work?.
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/
- 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
- 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
- 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
- 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
- Langade D, Kanchi S, Salve J, Debnath K, Ambegaokar D. Efficacy and safety of ashwagandha (Withania somnifera) root extract in insomnia and anxiety: a double-blind, randomized, placebo-controlled study. Cureus. 2019;11(9):e5797. doi:10.7759/cureus.5797
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.
