Free shipping over $200 Xpresspost 1–2 business days Orders before 4PM ET ship same day ≥98% purity — third-party tested COA on every batch Proudly Canadian
Free shipping over $200 Xpresspost 1–2 business days Orders before 4PM ET ship same day ≥98% purity — third-party tested COA on every batch Proudly Canadian

// COA Library

Verify the standard.

Every product. Every Certificate of Analysis. Independently tested. Available to download.

// The Standard

A fully Canadian
supply chain.

Most peptide testing in this category ships samples to Janoshik in Prague — a respected lab, but one that means weeks of waiting and customs risk for every Canadian seller.

We chose a different path. Every batch GREYGEM sells is sent to Testides Lab in Toronto for independent HPLC purity analysis and mass-spectrometry identity confirmation. Samples never cross a border. Results return in days.

Each certificate carries a unique verification ID. You can punch it into Testides' site and confirm the report is real — not edited, not screenshotted, not ours to fake.

// You verify · We publish · Every batch

// Lab Partner

Testides Lab

HPLC

Purity

LC-MS/MS

Identity

Public

Verification

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// Reference

How to read
a Certificate of Analysis.

If you've never read a peptide COA before, here's what each line actually tells you — and what to scrutinize before trusting any vendor.

Every legitimate COA includes

01

Identity by mass spec

The measured molecular mass should match the theoretical mass of the compound, typically within ±0.5 Da . If it doesn't match, the vial contains something different from what's on the label.

02

Purity by HPLC

A single, sharp peak indicates a pure compound. Multiple peaks or significant baseline noise indicate impurities. The percentage is the area of the target peak relative to all peaks — what you actually got.

03

Batch or lot number

Each batch should have a unique identifier matching what's printed on the vial label. Reused batch numbers across multiple production runs are a red flag — they suggest one COA is being shown for many shipments.

04

Date of testing

COAs older than twelve months on a still-sold product mean either the batch is very old or the same COA is being recycled. Both warrant questions before purchase.

05

Lab signature

A real COA names the testing lab, lists the analyst or signatory, and provides contact information. If those details are missing or the lab can't be independently verified, the document isn't worth much.

06

Lab verification ID

Testides issues every COA with a unique verification ID. Enter that ID at testides.com you'll see the original report directly from the lab — not a forwarded copy from us. If a vendor can't offer this, ask why.

Download. Review. Confirm.
No guesswork

// Browse

Now shop with confidence.

Every compound in the catalog moves through the same testing pipeline. Same lab, same methodology, same public verification.

© 2026 GREYGEM Peptides · Research use only · Not for human consumption

Proudly Canadian · CA-compliant dispatch

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