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How deep is the trial record for ashwagandha, and what does NIH say about it

PubMed holds 61 randomized-trial papers on ashwagandha, far fewer than creatine. NIH says some preparations may help with stress and insomnia, and notes rare liver-injury cases.

Figures read
2 November 2026, from the primary source
Next review
2 December 2026
Compiled and checked by
Whitepill editorial desk
Published
2 November 2026

Whitepill finding

On 2 November 2026, PubMed held 61 randomized-trial papers on ashwagandha, against 732 for creatine supplementation. NCCIH, in March 2023, said some preparations may be effective for insomnia and stress, and that there is not enough information on long-term safety. Counts show depth of record, not benefit.

PubMed and ClinicalTrials.gov counts read 2 November 2026; NCCIH statements from its page updated March 2023.

The short version

Ashwagandha: claims against the recordwhat gets said, and what the record shows, read 30 October 2026

What is ashwagandha?

NCCIH calls ashwagandha an evergreen shrub found in parts of India, Africa, and the Middle East.[1] It is sold as a dietary supplement, and NCCIH notes that supplements are not approved by FDA before they are sold.

The Copium Meter's hype-versus-trials view is on the ashwagandha page.

How deep is the trial record?

PubMed holds 61 papers typed as randomized controlled trials and 51 systematic reviews or meta-analyses for ashwagandha or Withania somnifera.[2]

PubMed papers on ashwagandha by type: randomized controlled trials 61, systematic reviews and meta-analyses 51. Randomized controlled trials: 61. Reviews, meta-analyses: 51Randomized controlled trials61Reviews, meta-analyses51
Papers typed as randomized controlled trials, and as systematic reviews or meta-analyses, for the published query, read 2 November 2026. Counts of tagged papers, not effect or quality.

The tag is PubMed's own publication type.[3] That is real depth compared with BPC-157, which has none typed as such, but much less than creatine or the other topics on the evidence ladder.

Trial-typed PubMed papers: creatine supplementation 732, ashwagandha 61. Creatine supplementation: 732. Ashwagandha: 61Creatine supplementation732Ashwagandha61
Trial-typed papers for two supplements, from two published queries (creatine read 30 October 2026, ashwagandha 2 November 2026). The gap is depth of record, not a ranking of which works better.

What else is registered?

ClinicalTrials.gov lists 90 interventional studies matching ashwagandha or Withania somnifera.[4] A registration is a plan on file, and we have not assessed any of them.

Interventional studies registered on ClinicalTrials.gov for ashwagandha: 90. Registered studies: 90Registered studies90
Interventional studies matching ashwagandha or Withania somnifera, read 2 November 2026. A registration is a plan on file, not a finished or positive result, and we have not assessed any of them.

What does NIH say it does?

NCCIH says research shows some ashwagandha preparations may be effective for insomnia and stress, and that evidence is unclear on anxiety.[1] It says ashwagandha may be safe when taken in the short term, up to 3 months, and that there is not enough information to reach conclusions on long-term safety.

What NCCIH says by question: Stress, insomnia (some may be effective), then Anxiety (evidence is unclear), then Long term (not enough info), then Liver (rare injury cases)Stress, insomniasome may be effectiveAnxietyevidence is unclearLong termnot enough infoLiverrare injury cases
NCCIH's page, updated March 2023, answered four questions differently. The arrows show the order of the page, not a progression.
How to read an ashwagandha claim
1. Which preparation? NCCIH says "some" preparations, not ashwagandha in general.
2. Which outcome? Stress and insomnia differ from anxiety, where NCCIH says evidence is unclear.
3. How long? NCCIH says safe short-term (up to 3 months) and not enough long-term information.
4. Liver injury is rare, but case reports exist.
5. Thyroid, autoimmune, pregnancy or medicines: ask a clinician first.

What are the risks and who should avoid it?

NCCIH says that although rare, a number of cases link liver injury to ashwagandha supplements.[1] A 2020 case series from Iceland and the US Drug-Induced Liver Injury Network described five cases and concluded the cases illustrate the hepatotoxic potential of ashwagandha.[5]

Read the reasoning

The same series found the injury typically cholestatic or mixed, with severe jaundice and itching, but self-limited, with liver tests normalizing in 1 to 5 months. NCCIH says to avoid ashwagandha during pregnancy, not to use it while breastfeeding, and it flags people who have autoimmune or thyroid disorders. It also says ashwagandha might interact with some medicines, including those for diabetes and high blood pressure.

From a trial count to a decision: Trial count (how deep the record is), then NIH and case reports (read the cautions), then Your history (thyroid, medicines), then A clinician (the decision)Trial counthow deep the record isNIH and case reportsread the cautionsYour historythyroid, medicinesA clinicianthe decision
This page measures only the first box and quotes the second. The last two are where a clinician earns the fee.

How should you use this page?

How this page was built

Method

Counts are PubMed records matching a published title and abstract query plus a publication-type filter, and ClinicalTrials.gov interventional studies matching the stated terms, both read 2 November 2026. NCCIH statements are quoted or closely paraphrased from its page (last updated March 2023), and the liver-injury case series was read in full at its PubMed Central copy, both on 2 November 2026. We did not read the NIH LiverTox entry for ashwagandha, so we print none of its ratings.

Queries are broad and will include off-topic papers, and publication-type tags can be loose, so treat the counts as depth of record (our grading rules are on the methodology page, and every comparison lives on the ladder hub). Nothing here measures effect size or study quality, covers dosing or products, or is medical advice. The full case series text is at PubMed Central.

The exact query

References

  1. a b c NCCIH (National Institutes of Health). Ashwagandha (last updated March 2023). nccih.nih.gov, read 2 November 2026.
  2. ↑ PubMed search on ashwagandha and Withania somnifera with publication-type filters; the query is printed in the method section. pubmed.ncbi.nlm.nih.gov, read 2 November 2026.
  3. ↑ National Library of Medicine. MeSH publication type: Randomized Controlled Trial. ncbi.nlm.nih.gov.
  4. ↑ ClinicalTrials.gov interventional studies matching ashwagandha or Withania somnifera, read 2 November 2026. clinicaltrials.gov, read 2 November 2026.
  5. ↑ PubMed, PMID 31991029. Liver injury due to ashwagandha: a case series from Iceland and the U.S. Drug-Induced Liver Injury Network. Liver International, 2020 (five cases). Full text read at PMC8041491. pubmed.ncbi.nlm.nih.gov, read 2 November 2026.

FAQ

How many randomized trials are there on ashwagandha?

PubMed held 61 papers typed as randomized controlled trials and 51 systematic reviews or meta-analyses for ashwagandha or Withania somnifera on 2 November 2026.

Is ashwagandha proven?

NCCIH says research shows some ashwagandha preparations may be effective for insomnia and stress, that evidence on anxiety is unclear, and that there is not enough information on long-term safety.

Can ashwagandha harm the liver?

NCCIH says that although rare, a number of cases link liver injury to ashwagandha supplements, and a 2020 case series of five cases described its hepatotoxic potential, with liver tests normalizing in 1 to 5 months.

Does a high trial count mean it works for me?

No. It means the record is deep. Which preparation was studied, effect size and your own situation are separate questions for a clinician.

Bottom line

Ashwagandha has a moderate trial record and hedged findings from NIH, plus rare liver-injury reports and groups who should avoid it. Use the count to see where the record stands, then ask a clinician about you.

Related on Whitepill

EvidenceThe evidence ladderTrial depth for nine self-improvement topics, side by side.Copium MeterIs ashwagandha copium?Hype against the trial record, one topic.EvidenceCreatine: trial record and what NIH saysOne of the deepest records in the scene, and two NIH pages with different tones.