Best Ashwagandha for Sleep (2026): The Doses and Extracts Studied
Ashwagandha is not a sedative. A meta-analysis of randomized trials looked at sleep scores at doses up to 600mg/day for 8+ weeks; trials were small and results were mixed (Cheah 2021, PMID: 34559859).
If you mainly struggle with sleep timing, melatonin is a different tool; see the comparison below.
Shoden extract: Thorne (Shoden). KSM-66 extract: Nootropics Depot KSM-66 (2 × 300mg servings reach 600mg).
What the sleep trials measured
Ashwagandha is not a sedative. It does not act like a sleeping pill or a dose of melatonin. Trials have measured cortisol and stress scores (see the stress research) as well as sleep scores.
A systematic review and meta-analysis of randomized controlled trials looked at sleep-quality scores versus placebo across doses and durations, including 600mg/day and treatment of at least 8 weeks (Cheah 2021, PMID: 34559859). A double-blind RCT measured sleep onset, quality, and sleep efficiency (Langade 2021, PMID: 32818573).
Ashwagandha vs melatonin for sleep
| Ashwagandha | Melatonin | |
|---|---|---|
| What it does | Studied for cortisol, stress and sleep-quality scores | Timing signal for the body clock |
| Speed | Builds over weeks | Acts the same night |
| Best for | Studied over weeks of daily use | Studied for jet lag and shift work |
| Dose | 600mg/day standardized extract | 0.5-3mg before bed |
They do different jobs. Ashwagandha is studied over weeks; melatonin is a timing signal. Plenty of people use both.
How to take it for sleep
- Dose: aim for 600mg/day of standardized KSM-66 (the dose used in the sleep trials), or ~120-240mg of higher-potency Shoden.
- Timing: evening is sensible, but consistency over weeks matters more than the exact hour.
- Timeframe: the meta-analysis looked at 8+ weeks of use. It is not a first-night product.
Best ashwagandha for sleep, ranked
| Product | Extract | Dose | Servings | Price | Cost/Day | Cert. (as listed; not confirmed in a public registry) | Buy |
|---|---|---|---|---|---|---|---|
| NOW Foods Ashwagandha Extract (450mg, 90ct) | Generic root | 450mg | 90 | $9.85 | $0.11 | None | Buy |
| Jarrow Formulas Ashwagandha KSM-66 (300mg, 120ct) Budget Pick | KSM-66 (5%) | 300mg | 120 | $22.93 | $0.19 | None | Buy |
| Nootropics Depot KSM-66 Ashwagandha (300mg, 90ct) Best Value | KSM-66 (5%) | 300mg | 90 | $22.99 | $0.25 | Third-Party Tested | Buy |
| Thorne Ashwagandha (Shoden, 120mg, 30ct) Quality Pick | Shoden (~35%) | 120mg | 30 | $22.00 | $0.73 | NSF Certified for Sport (brand-stated; not confirmed in the public registry) | Buy |
Why Thorne tops this one: Thorne uses Shoden, the high-potency extract featured in sleep research, and is labelled NSF Certified for Sport, but we could not confirm that SKU in the public registry. If you'd rather use the most-studied KSM-66 extract, Nootropics Depot at two 300mg capsules reaches the 600mg sleep dose cheaply.
Safety & who should skip it
- Pregnancy: do not use.
- Thyroid conditions: it can raise thyroid hormone — check with your doctor.
- Autoimmune disease / immunosuppressants: use caution.
- Other sedatives or sleep meds: effects can be additive — don't combine without medical advice.
- Liver: rare injury cases reported; stop for jaundice, dark urine, or unusual fatigue.
Safety per the NIH Office of Dietary Supplements. Chronic insomnia deserves a medical evaluation, not just a supplement.
Frequently asked questions
Does ashwagandha help you sleep?
A meta-analysis looked at sleep-quality scores at doses up to 600mg/day for 8+ weeks. Trials were small and results were mixed. Ashwagandha is not a sedative.
How much for sleep?
600mg/day of standardized KSM-66 is the dose in the sleep trials; higher-potency Shoden is ~120-240mg. Evening dosing is fine; consistency matters more.
Ashwagandha or melatonin?
Different jobs. Melatonin is a same-night timing signal (onset, jet lag). Ashwagandha was studied for sleep quality over weeks. Some people use both.
Can I take it every night?
Studies ran 8-12 weeks; long-term safety past a few months isn't well established, and no trial tested taking breaks. Avoid in pregnancy; caution with thyroid/autoimmune/sedatives/liver.
Related guides
- Ashwagandha: stress research and picks
- Best Ashwagandha Overall
- Magnesium for Sleep — another stress/sleep option
- All Ashwagandha Products
Sources
- Cheah KL, et al. "Effect of Ashwagandha (Withania somnifera) extract on sleep: A systematic review and meta-analysis." PLoS One. 2021;16(9):e0257843. PMID: 34559859
- Langade D, et al. "Clinical evaluation of the pharmacological impact of ashwagandha root extract on sleep in healthy volunteers and insomnia patients." J Ethnopharmacol. 2021;264:113276. PMID: 32818573
- NIH Office of Dietary Supplements. "Ashwagandha: Is it helpful for stress, anxiety, or sleep?" ods.od.nih.gov