Third-Party Tested Ashwagandha (2026): The 8 of 27 on a Public List
By Erin Rose Updated October 8, 2026 How we score
8 of the 27 ashwagandha supplements we score are on a public testing list. The top three: Transparent Labs (Informed Choice), Momentous (NSF Certified for Sport) and BulkSupplements Ashwagandha Root Extract Powder (NSF Certified for Sport). 5 more are below. 5 of the 8 are also screened for drugs banned in sport.
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Which ashwagandha is on which list
| Product | Lists | Kind |
|---|---|---|
| Momentous Ashwagandha, NooGandha 300 mg | NSF Certified for Sport, NSF/ANSI 173 | Contents + banned substances |
| Transparent Labs KSM-66 Ashwagandha 600 mg | Informed Choice | Banned substances |
| Core Med Science KSM-66 Ashwagandha 600 mg | NSF/ANSI 173 | Contents |
| BulkSupplements Ashwagandha Root Extract Powder | NSF Certified for Sport, NSF/ANSI 173 | Contents + banned substances |
| Youtheory Ashwagandha 1,000 mg blend with KSM-66 | NSF/ANSI 173 | Contents |
| Thorne Ashwagandha, Shoden 120 mg | NSF/ANSI 173 | Contents |
| BulkSupplements Organic Ashwagandha Root Powder | NSF Certified for Sport, NSF/ANSI 173 | Contents + banned substances |
| Klean Athlete Klean Ashwagandha 500 mg | NSF Certified for Sport, NSF/ANSI 173 | Contents + banned substances |
The other 19 we score are on none of the five lists, including all 5 gummies.
What each testing list checks
Two kinds. A contents program checks that the product holds what the label says. A banned-substance program screens for drugs banned in sport, which matters only if you are drug-tested.
| List | What it checks | How it samples |
|---|---|---|
| NSF/ANSI 173contents | That the product holds the ingredients on the label and nothing else, and has no harmful levels of contaminants. | Annual audits, and NSF retests each product from time to time. Not a banned-substance program. |
| USP Verifiedcontents | That the product holds the ingredients on the label in the stated amounts, has no harmful levels of listed contaminants, breaks down in a set time, and is made under FDA good manufacturing practice. | Audits, lab tests before listing, and tests of listed products bought off the shelf. |
| NSF Certified for Sportbanned substances | The label matches the contents, plus screening for substances banned in sport. | Factory audits; listings can be searched by lot. |
| Informed Choicebanned substances | Banned substances. | Samples bought from stores at least monthly and blind tested. |
| Informed Sportbanned substances | Banned substances. | Every batch, before it is released to market. |
Which tested ashwagandha to buy
For most people, our pick above. If you are drug-tested, Momentous Ashwagandha, NooGandha 300 mg: it is on NSF Certified for Sport + NSF/ANSI 173. The other listed products:
- Buy Momentous Ashwagandha, NooGandha 300 mg (60 Capsules) on Amazon
- Buy Core Med Science KSM-66 Ashwagandha 600 mg (60 Capsules) on Amazon
- Buy BulkSupplements Ashwagandha Root Extract Powder (250 g) on Amazon
- Buy Youtheory Ashwagandha 1,000 mg blend with KSM-66 (60 Capsules) on Amazon
- Buy Thorne Ashwagandha, Shoden 120 mg (30 Capsules) on Amazon
- Buy BulkSupplements Organic Ashwagandha Root Powder (500 g) on Amazon
- Buy Klean Athlete Klean Ashwagandha 500 mg (60 Capsules) on Amazon
The 3 best ashwagandha supplements · what a trial day costs, brand by brand.
What the brand says, and what we could confirm
| What the brand says | How many of the 27 we score |
|---|---|
| On a public list | 8 products, every one in the table above |
| Says “third-party tested” | 7 products |
| No testing claim | 12 products |
A claim with no listing is the brand’s word: no outside group has checked it.
How to check your bottle
- Find the mark. Look for an NSF, USP or Informed mark. “Third-party tested” with no mark is a claim.
- Open the program’s own list. NSF/ANSI 173, USP Verified, NSF Certified for Sport, Informed Choice, Informed Sport. Or search all five on our testing-list index.
- Search the product, not just the brand. A brand with one listed product can sell others that are not.
- Check the lot. NSF Certified for Sport can certify named lots only. Match the lot number on your bottle.
Questions
Which ashwagandha supplements are third-party tested?
Of the 27 we score, 8 are on a public testing list. NSF Certified for Sport: Momentous, BulkSupplements (2 products) and Klean Athlete. Informed Choice: Transparent Labs. NSF/ANSI 173 only: Core Med Science, Youtheory and Thorne.
Is KSM-66 third-party tested?
Only some KSM-66 products are. KSM-66 is an extract that many brands buy and put in their own capsules, and testing lists check each finished product, not the extract. Of the 9 KSM-66 capsules we score, 3 are on a list: Transparent Labs (Informed Choice), Core Med Science (NSF/ANSI 173) and Youtheory (NSF/ANSI 173).
My ashwagandha says “third-party tested” but is not on a list. Is it tested?
Maybe, but you cannot check it. 7 of the 27 products we score say “third-party tested” and are on none of the five public lists. Some brands post their own lab reports. Those can be useful, but no outside group checks them.
Is Core Med Science ashwagandha NSF Certified for Sport?
Its label shows an NSF Certified for Sport mark. We found it on NSF/ANSI 173, which checks that the contents match the label, but not on NSF’s Certified for Sport list when we checked on October 7, 2026. If you are drug-tested, search the product and your lot number at nsfsport.com before relying on it.
Are ashwagandha gummies third-party tested?
None of the 5 gummies we score is on a public testing list. If you want a tested product, choose a capsule or powder from the table above; our dosage guide shows how many gummies make a trial day.
Does “third-party tested” on the label mean anything?
On its own, no. The phrase has no set meaning. A listing on a public program is something you can check yourself; a label claim is the brand’s word.
Sources
- NSF/ANSI 173 (info.nsf.org), NSF Certified for Sport (nsfsport.com) and Informed Choice (choice.wetestyoutrust.com), searched October 7, 2026; USP Verified and Informed Sport from our copies of September 22, 2026. NSF Certified for Sport listing details (lots, sizes) read October 7, 2026.
- Brand claims: each brand’s label (NIH Dietary Supplement Label Database) or store page. Prices: each brand’s list price, as on our ashwagandha price list.