5.0
Transparent from checkout to COA
🙏 I like that you can pull the report before reconstitution. Zenith Biopeptides linked Janoshik on one of my lots and it verified. That's the bar imo.
researchEvans21 · about 1 month ago
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Zenith Biopeptides
High-volume catalog with per-lot HPLC and MS documentation from accredited third-party laboratories.
4.8(16)
95.00/100
Overview
Zenith Biopeptides operates a broad research peptide catalog with per-lot testing and publicly accessible documentation. Reports typically pair HPLC purity data with mass-spectrometry identity confirmation, and COAs are linked from individual product pages so you can review the lot in hand before reconstitution.
A strong fit for labs that order frequently and want chromatograms plus batch IDs on file for every major SKU.
Highlights
- Per-lot COAs posted publicly
- HPLC chromatograms on file
- MS identity confirmation
- Reports linked from product pages
Official links
Scorecard
Full scorecard and COA notes are free with an account.
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4.8(16)
Member ratings reflect transparency, documentation, and communication. They supplement — and never override — our editorial vetting scorecard. Research use only.
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Sign in5.0
Zenith Biopeptides COA matched the vial batch
Ordered twice for our cell culture work. Both times the lot on the label matched the PDF COA — HPLC peak looked clean and they had MS on file when I asked. Shipping was quick, no drama. Would use again for RUO materials.
nitrogenglove_31 · 2 months ago
5.0
⚠️ Best COA workflow I've used
We compare vendors pretty carefully before adding them to our approved supplier list. Zenith Biopeptides publishes third-party testing and the lot numbers actually line up. Identity + purity both there. Communication was professional.
Helen Hall · 3 months ago
4.0
Solid documentation from Zenith Biopeptides
📦 Not perfect but better than most. COA was batch specific, chromatogram included. Support answered a question about storage within a day. Minor packaging ding on the second order but peptide itself seemed fine in our QC checks.
ChromIris11 · 5 months ago
5.0
📊 Consistent batch paperwork
Three reorders, three matching lot numbers on vial vs portal. Chromatograms were full-page, not cropped screenshots. Zenith Biopeptides is what we point new grad students to for COA literacy examples.
steven_hplc · 6 months ago
5.0
Best COA workflow I've used ✅
We compare vendors pretty carefully before adding them to our approved supplier list. Zenith Biopeptides publishes third-party testing and the lot numbers actually line up. Identity + purity both there. Communication was professional.
chemLaura87 · 7 months ago
5.0
Transparent from checkout to COA
📝 I like that you can pull the report before reconstitution. Zenith Biopeptides linked Janoshik on one of my lots and it verified. That's the bar imo.
p.matthew · 8 months ago
5.0
📊 Zenith Biopeptides COA matched the vial batch
⚠️ Ordered twice for our cell culture work. Both times the lot on the label matched the PDF COA — HPLC peak looked clean and they had MS on file when I asked. Shipping was quick, no drama. Would use again for RUO materials.
emily.rivera · 9 months ago
5.0
Zenith Biopeptides — documentation is the product
Our QA team cares about traceability more than turnaround. Zenith Biopeptides had batch-specific HPLC + MS on every SKU we ordered this quarter. Support answered a technical question same day.
jessica_moore60 · 9 months ago
5.0
🤔 Zenith Biopeptides — documentation is the product
Our QA team cares about traceability more than turnaround. Zenith Biopeptides had batch-specific HPLC + MS on every SKU we ordered this quarter. Support answered a technical question same day.
probably_tara · 11 months ago
5.0
📦 Best COA workflow I've used
🤔 We compare vendors pretty carefully before adding them to our approved supplier list. Zenith Biopeptides publishes third-party testing and the lot numbers actually line up. Identity + purity both there. Communication was professional.
brian_ruo · 12 months ago
5.0
Transparent from checkout to COA
I like that you can pull the report before reconstitution. Zenith Biopeptides linked Janoshik on one of my lots and it verified. That's the bar imo.
chemHelen31 · 12 months ago
5.0
📝 Zenith Biopeptides COA matched the vial batch
Ordered twice for our cell culture work. Both times the lot on the label matched the PDF COA — HPLC peak looked clean and they had MS on file when I asked. Shipping was quick, no drama. Would use again for RUO materials.
j.brian · about 1 year ago
3.0
Average transparency for the category
📊 HPLC numbers look reasonable when they post them, but the site makes you dig for older batches. Support was polite, not always fast. I'd reorder for non-critical assays only.
William M. · over 1 year ago
5.0
Transparent from checkout to COA
👀 I like that you can pull the report before reconstitution. Zenith Biopeptides linked Janoshik on one of my lots and it verified. That's the bar imo.
Owen T. · over 1 year ago
4.0
📝 Solid documentation from Zenith Biopeptides
Not perfect but better than most. COA was batch specific, chromatogram included. Support answered a question about storage within a day. Minor packaging ding on the second order but peptide itself seemed fine in our QC checks.
HPLCKid · over 1 year ago
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