State of Peptide Vendors: November 2026 (to date)
Our vendor ratings for November 2026, computed from the audit data behind every score: who was reviewed, how the scores moved, and what the certificates show. Research use only; nothing here is a health or dosing claim.
- Vendors reviewed
- 100
Vendors reviewed
- Median score
- 6.45
Median score
- Pass testing gate
- 68%
Pass testing gate
- Certificates on file
- 1,746
Certificates on file
Summary
As of November 6, 2026, Peptide Source Review lists 100 vendors. 68% (68) pass the testing gate, and the median overall score is 6.45 of 10, with a median lab score of 7.0. We hold 1,746 certificates of analysis; 87% were confirmed at the issuing laboratory, the median purity they report is 99.69%, and 40% include an endotoxin or sterility test. In November 2026 (to November 6): 8 vendors published for the first time, 33 score moves of 0.05 points or more were logged across 26 vendors (11 up, 22 down), 1 vendor removed, 2 laboratories found not to be established as independent. The largest rise was Arctic Lab Supply (6.16 to 7.09). The largest fall was Cernum Biosciences (5.24 to 4.68).
Affiliate status never affects scores. Whether a vendor pays us a commission, declined to, or was never asked carries no weight in the formula. How we keep it that way.
Headline numbers
Today’s data, as of November 6, 2026.
- Vendors reviewed
- 100
- Pass the testing gate
- 68%
- 68 of 100
- Median overall score
- 6.45
- Out of 10
- Median lab score
- 7.0
- Out of 10
- Certificates on file
- 1,746
- Confirmed at the issuing lab
- 87%
- Share of certificates
- Median purity
- 99.69%
- As printed on the certificates
- Endotoxin or sterility tested
- 40%
- Share of certificates
Vendors by tier
Movers
Net change over the month for each vendor whose score moved by 0.05 points or more, from the dated audit history. Each name links to that vendor’s full score history. 33 moves of that size were logged (11 up, 22 down) across 163 audit entries.
Biggest rises
- Arctic Lab Supply6.16 → 7.09 (+0.93)net of 7 entries
- GenX Bio3.68 → 4.39 (+0.71)net of 2 entries
- Rogue Compounds6.60 → 6.86 (+0.26)net of 3 entries
- Limitless Biotech6.85 → 6.97 (+0.12)net of 3 entries
- Ameano Peptides7.70 → 7.80 (+0.10)
- Direct Peptides7.36 → 7.43 (+0.07)net of 2 entries
- Amino Club8.03 → 8.08 (+0.05)net of 3 entries
- Honest Peptide7.66 → 7.71 (+0.05)net of 3 entries
Biggest falls
- Cernum Biosciences5.24 → 4.68 (-0.56)net of 5 entries
- NextGen Peps6.36 → 5.95 (-0.41)net of 3 entries
- JD BioWorks6.71 → 6.34 (-0.37)net of 3 entries
- Hacker Peptides6.67 → 6.32 (-0.35)
- Peptara Labs2.66 → 2.38 (-0.28)
- Peptide.Express4.06 → 3.90 (-0.16)
- Prime Peptides8.10 → 7.94 (-0.16)net of 2 entries
- Welon Peptide Solutions2.29 → 2.13 (-0.16)
Vendors added and removed
First published (8)
- Bluum PeptidesNovember 1, 2026, at 7.48
- Stack ResearchNovember 1, 2026, at 2.49
- Pacific Edge LabsNovember 2, 2026, at 7.15
- Snowman ResearchNovember 2, 2026, at 3.05
- Welon Peptide SolutionsNovember 2, 2026, at 2.29
- PeptyesNovember 5, 2026, at 6.55
- GhostLabzNovember 6, 2026, at 6.14
- NextSelf LabsNovember 6, 2026, at 6.26
Removed (1)
- Soma Chems, November 3, 2026: store closed.
Laboratories and certificates
- Verum Analytics, November 2, 2026: Independence not established; graded tier D.
- Titreon Analytical, November 2, 2026: Independence not established; graded tier D.
4 laboratory gradings were last checked this month. Our laboratory records carry the date of a finding that a laboratory’s independence was not established, but not the date a laboratory was first added or its earlier tier, so other additions and tier changes are not listed here. Every tier is on the laboratory directory.
Of the certificates on file today, 9 carry a laboratory test date in November 2026. Their median printed purity is 99.83%, 100% were confirmed at the issuing laboratory, and 22% include an endotoxin or sterility test.
Methodology
Every number on this page is generated from the same audit data as the rankings when the site is built, with no hand-entered figures. Scores, tiers and the testing gate follow our published methodology. Certificates on file are those from laboratories whose independence we could establish; a certificate counts as confirmed when its verification key was checked at the issuing laboratory. Purity is the figure printed on the certificate. Movers are net changes over the month from the dated history on score changes. A past month reports its dated changes; its month-end state is shown only where the data records it.
Cite this report
Peptide Source Review. "State of Peptide Vendors: November 2026 (to date)." Data as of November 6, 2026. https://peptidesourcereview.info/state-of-peptide-vendors/2026-11
Data: https://peptidesourcereview.info/state-of-peptide-vendors/2026-11.csv, licensed CC BY 4.0. Please credit Peptide Source Review and link this page.