Headline finding · criterion 5 of 6
None of 18 best-selling gut supplements publish a publicly accessible third-party certificate of analysis
None of the 18 best-selling gut-health supplements audited by Supplement Facts Check publish a third-party certificate of analysis reachable with no email gate and no account. For all 18, a documented search found no publicly accessible third-party certificate.
The sample. 18 products scored so far from the top 30 of Amazon’s Best
Sellers in Probiotic Nutritional Supplements, captured 09/26/2026. Every inclusion and exclusion decision is
listed on the results page. Read these as pilot results, not a ranking.
What a 0 means here. A 0 records that a documented
search — product page, brand site, site-scoped search and the retail listing — did not find a publicly accessible
third-party certificate on the date shown. That is a negative finding about public accessibility, not a claim that
no certificate exists or that a product is contaminated.
Criterion 5: Certificate of analysis is public
A third-party certificate is reachable with no email gate and no account. It scores 1 or 0, with no weighting and no partial credit, under methodology v1.14, locked 2026-10-26. Read the full methodology →
All 18 scored products
Every row that went into the figure above, with the reasoning recorded for this criterion and the date the label was read. Each product links to its full scorecard and the dated label captures the score was read from.
| Product | Criterion 5 | Total | Reasoning recorded for this criterion | Label captured |
|---|---|---|---|---|
| Florastor Probiotic Florastor | 0 ✗ | 5/6 | No publicly accessible third-party certificate of analysis located 2026-09-26. The search covered the 10 listing images, florastor.com navigation and footer (no Quality, Testing, Lab Results or Transparency link exists), the florastor.com FAQ page, and a site-scoped web search for 'certificate of analysis'. Recorded as a negative finding, not a claim that none exists. | 2026-09-26 |
| Align Probiotic Pro Formula Align | 0 ✗ | 4/6 | No publicly accessible third-party certificate of analysis located 2026-09-27. Search covered the 12 listing images, alignprobiotics.com product and education pages, and a site-scoped web search for 'certificate of analysis'. The alignprobiotics.com footer could not be walked directly because the domain is blocked to this session's browser, so the brand-site leg of the search is weaker here than for other rows. Recorded as a negative finding, not a claim that none exists. | 2026-09-27 |
| Digestive Advantage Probiotic Gummies Digestive Advantage | 0 ✗ | 4/6 | No publicly accessible third-party certificate of analysis located 2026-09-27 (listing images, the schiffvitamins.com product page, site-scoped and open web search). The page carries the claim that the 'clinically tested BC30 probiotic' survives stomach acid '100x better versus yogurts', with no document behind it, which the methodology excludes explicitly. Recorded as a negative finding, not a claim that none exists. | 2026-09-27 |
| MaryRuth Organics Kids Probiotics MaryRuth Organics | 0 ✗ | 4/6 | No publicly accessible third-party certificate of analysis located 2026-09-27 (listing images, maryruthorganics.com including the quality page, site-scoped and open web search). The listing and site display Clean Label Project Purity Award and B Corp certification marks, which are certifications rather than product certificates of analysis and are excluded on the same basis as GMP marks. Recorded as a negative finding, not a claim that none exists. | 2026-09-27 |
| Culturelle Daily Chewable Probiotics for Kids Culturelle | 0 ✗ | 3/6 | No publicly accessible third-party certificate of analysis located 2026-09-27 (listing images, culturelle.com, site-scoped and open web search), consistent with the same finding for Culturelle Pro Strength on 2026-09-26. Recorded as a negative finding, not a claim that none exists. | 2026-09-27 |
| Culturelle Pro Strength Probiotics Culturelle | 0 ✗ | 3/6 | No publicly accessible third-party certificate of analysis located 2026-09-26 (product page images, culturelle.com, site-scoped search, open web search); recorded as a negative finding, not a claim that none exists. | 2026-09-26 |
| Nature's Bounty Probiotic Acidophilus Nature's Bounty | 0 ✗ | 3/6 | No publicly accessible third-party certificate of analysis located 2026-09-26 (product page images, brand and parent-company pages, open web search); recorded as a negative finding, not a claim that none exists. | 2026-09-26 |
| Align Probiotic Bloating Relief + Food Digestion Align | 0 ✗ | 2/6 | No publicly accessible third-party certificate of analysis located 2026-09-27. Same search as the Align Pro Formula row and the same limitation: the alignprobiotics.com footer could not be walked directly because the domain is blocked to this session's browser. Recorded as a negative finding, not a claim that none exists. | 2026-09-27 |
| Lemme Debloat Digestive & Gut Health Gummies Lemme | 0 ✗ | 2/6 | No publicly accessible third-party certificate of analysis located 2026-09-27 (listing images, brand site, site-scoped and open web search). Listing image 5 displays a Clean Label Project Purity Award, which is a certification mark rather than a product certificate of analysis and is excluded on the same basis the methodology excludes GMP and facility certificates. Recorded as a negative finding, not a claim that none exists. | 2026-09-27 |
| NOW Supplements Probiotic-10 NOW Foods | 0 ✗ | 2/6 | No publicly accessible third-party certificate of analysis located for this product on 2026-09-27. NOW does operate a public lot-number certificate portal at cofa.nowfoods.com with no email gate or account, which would satisfy the criterion, but it is scoped to NOW's essential oils and does not cover supplements; the sample lot record checked was Peppermint Oil. Listing image 6 presents Intertek GMP certification, which the methodology excludes explicitly as a facility certificate rather than a product one. Recorded as a negative finding, not a claim that none exists. | 2026-09-27 |
| NewRhythm Probiotics 50 Billion CFU NewRhythm | 0 ✗ | 2/6 | No publicly accessible third-party certificate of analysis located 2026-09-27 (listing images, brand site, site-scoped and open web search). The bottle front prints '3RD PARTY TESTED' and listing image 6, headed 'We take test seriously', shows specification tables for microbiological and heavy metal contamination with generic passed marks, carrying no laboratory name, no batch or lot number, no numerical results and no date. That is a testing claim without a document behind it, which the methodology excludes explicitly. Recorded as a negative finding, not a claim that none exists. | 2026-09-27 |
| Phillips' Colon Health Daily Probiotic Phillips' | 0 ✗ | 2/6 | No publicly accessible third-party certificate of analysis located 2026-09-27 (listing images, phillipsdigestive.com, site-scoped and open web search). Recorded as a negative finding, not a claim that none exists. | 2026-09-27 |
| Physician's CHOICE Probiotics 60 Billion CFU Physician's Choice | 0 ✗ | 2/6 | No publicly accessible third-party certificate of analysis located 2026-09-07 (product page, brand site, site-scoped search, retail listing images); recorded as a negative finding, not a claim that none exists. | 2026-09-07 |
| Seed DS-01 Daily Synbiotic Seed | 0 ✗ | 2/6 | No publicly accessible third-party certificate of analysis located 2026-09-07 (product page, brand site, site-scoped search, retail listing images); recorded as a negative finding, not a claim that none exists. | 2026-09-07 |
| BIOMA Probiotics BIOMA | 0 ✗ | 1/6 | No publicly accessible third-party certificate of analysis located 2026-09-07 (product page, brand site, site-scoped search, retail listing images); recorded as a negative finding, not a claim that none exists. | 2026-09-07 |
| Doctor's Recipes Women's Probiotic Doctor's Recipes | 0 ✗ | 1/6 | No publicly accessible third-party certificate of analysis located 2026-09-27 (listing images, Amazon brand store, site-scoped search). Listing image 6 presents a 'Quality Checked at Every Stage' graphic with Testing and Additional Testing steps, which is a claim with no document behind it and is explicitly not a certificate under the methodology. Recorded as a negative finding, not a claim that none exists. | 2026-09-27 |
| Garden of Life Dr Formulated Probiotics for Men Garden of Life | 0 ✗ | 1/6 | No publicly accessible third-party certificate of analysis located 2026-09-27 (listing images, site-scoped search). Garden of Life publishes certificates for its separate CBD line only; no equivalent was found for the supplement line. Recorded as a negative finding, not a claim that none exists. | 2026-09-27 |
| Garden of Life Dr. Formulated Kids+ Probiotics Garden of Life | 0 ✗ | 1/6 | No publicly accessible third-party certificate of analysis located 2026-09-27, consistent with the finding for Garden of Life Dr Formulated Probiotics for Men on the same date. The panel carries NSF Gluten-Free, Non-GMO Project Verified, USDA Organic and a 'Shelf Stable Potency Promise' mark, all of which are certifications or claims rather than product certificates of analysis. Recorded as a negative finding, not a claim that none exists. | 2026-09-27 |
See these rows in the dataset →
Citing this finding
The sentence above is generated from the dataset at build time, so it cannot drift from the rows listed on this page. Quote it as:
None of the 18 best-selling gut-health supplements audited by Supplement Facts Check publish a third-party certificate of analysis reachable with no email gate and no account. Supplement Facts Check, methodology v1.14, labels captured 2026-09-07 to 2026-09-27. https://supplementfactscheck.org/findings/public-third-party-certificate-of-analysis.html
The underlying data is public domain under CC0 1.0 and needs no permission to reuse. The repository holds the scores, the rubric and the commit history of every ruling. Corrections are welcome as issues.