GLP-3 R - 12mg Lot RET12#05582: Certificate of Analysis (COA)
Paramount Peptides · tested Jul 7, 2026 by Accumark Labs · Most recent COA
This page summarizes the third-party lab report for lot RET12#05582 of GLP-3 R - 12mg sold by Paramount Peptides. The lot number on this page should match the lot printed on the vial label. Don't rely on this summary alone: use the button to open the lab's own record and compare the lot, date and results.
GLP-3 R - 12mg lot RET12#05582 test results, explained
Every result printed on this certificate, as reported by Accumark Labs, with a plain-English note on what the test measures. "Pass" and "specification" wording comes from the certificate; where the lab prints no pass/fail, we say so.
| Test | Result on the certificate | What it measures | This lot |
|---|---|---|---|
| HPLC purity | 99.685% · Retatrutide - Purity: 99.685% (spec > 98.0%; lab status: Conforms) | HPLC separates the sample into its components; purity is the share of the detected signal that sits in the main peak. On its own it doesn't show which molecule that peak is. That's what the identity test is for. | Meets the lab's specification (> 98.0%) |
| Identity | Conforms | Mass spectrometry measures the molecular mass of what's in the vial and compares it with the declared compound. "Confirmed" means the lab found the expected compound. | Reported as matching the declared compound |
| Quantity (measured content) | 12.05 mg | How much peptide the lab measured in the vial, compared with the amount printed on the label. | 100% of the 12 mg label amount |
| Endotoxin | Conforms (Spec: ≤ 5.0 EU/mL) | Bacterial endotoxins are fragments of bacterial cell walls. The LAL assay measures them in endotoxin units (EU/mL); a pass means the result was under the lab's limit. | Pass (as reported by the lab) |
| Rapid sterility screen (PCR) | Conforms (Spec: Not Detected) | A DNA-based (PCR) screen for common microbial contamination. It is a rapid screen, not a full sterility test. Test as named on the certificate: Rapid Sterility Screening (PCR). | Pass (as reported by the lab) |
Lot and report details
| Lot / batch number | RET12#05582 |
|---|---|
| Product (as labeled by vendor) | GLP-3 R - 12mg |
| Labeled vial size | 12 mg |
| Testing laboratory | Accumark Labs |
| Sample received by lab | Jul 2, 2026 |
| Report date | Jul 7, 2026 |
| Sample size tested | 12.0 mg |
| Sample type (lab's label) | Peptide |
| Verification code (Report ID) | MDTZ-AFJX |
| Lab-record check | Lab's own record opened on Oct 7, 2026; lot number matched. |
| Vendor | Paramount Peptides |
| Verify | Open Accumark Labs's record ↗ |
Data notes: COA has 2 pages.
The certificate itself
About Accumark Labs
An independent US analytical lab. Per its terms of use, Accumark Labs is a DBA of Valence Analytical LLC. Reports are published through AccuVerify, which shows each report from the lab's own records at a unique web address.
Accreditation: Accumark's website lists ISO/IEC 17025 accreditation as pending. We found no published accreditation certificate (checked Oct 7, 2026).
Tests: On the certificates here: HPLC purity, identity, quantity and, where ordered, endotoxin and a rapid sterility screen (PCR).
How to verify: Open accumarklabs.com/verify and enter the verification code (Report ID). The live record should show the same lot, dates and results as this page.
Open Accumark Labs's record ↗Lab info from: accumarklabs.com · Accumark terms of use · checked Oct 7, 2026.
GLP-3 R - 12mg lot history at Paramount Peptides
All 12 certificates we have for this product from Paramount Peptides, newest first. The chart plots HPLC purity by report date (lots without a purity figure are left out). This lot is highlighted.
| Lot | Report date | Lab | HPLC purity |
|---|---|---|---|
| RET12#05582 | Jul 7, 2026 | Accumark Labs | 99.69% |
| RET12#94068 | Jul 7, 2026 | Accumark Labs | 99.90% |
| TR12N061026 | Jul 1, 2026 | Accumark Labs | 99.96% |
| TR12N052126 | Jun 9, 2026 | Accumark Labs | 99.59% |
| TR12N032326 | Apr 24, 2026 | Janoshik | 99.85% |
| RENEW12N021326 | Feb 27, 2026 | Janoshik | 99.61% |
| RENEW12N021726 | Feb 27, 2026 | Janoshik | 99.40% |
| RENEW12N011526 | Feb 13, 2026 | Janoshik | 99.63% |
| RET12N070725 | Jul 22, 2025 | Janoshik | 99.33% |
| RET12N061625 | Jun 26, 2025 | Janoshik | 99.42% |
| RET12N021125 | Feb 20, 2025 | Janoshik | 99.72% |
| RET12N11142024 | Nov 22, 2024 | Janoshik | 99.52% |
What to check on your vial
- The lot number on the vial label reads RET12#05582, character for character.
- The product name and vial size on the label match GLP-3 R - 12mg (12 mg).
- The lab's own record (accumarklabs.com, code MDTZ-AFJX) shows the same lot, report date (Jul 7, 2026) and results as this page.
- The report date is a date you'd expect for your purchase: a much older certificate may belong to an earlier lot.
- The identity line names the compound you expect. If it's "Not reported", the certificate doesn't confirm which molecule is in the vial.
- The certificate is a clean document: no mismatched fonts, edited numbers or a missing verification code.
How to check this COA in under a minute
- Find the lot number on your vial label and confirm it reads RET12#05582.
- Open Accumark Labs's record with the button above, or go to accumarklabs.com and enter MDTZ-AFJX.
- Compare the lot number, test date, purity and identity result with the table above. They should be identical.
- New to COAs? Read How to read a peptide COA for what HPLC purity and mass spec identity mean.
Questions about lot RET12#05582
What HPLC purity did GLP-3 R - 12mg lot RET12#05582 test at?
Accumark Labs reported 99.69% HPLC purity for lot RET12#05582 in a report dated Jul 7, 2026.
How do I verify the COA for lot RET12#05582?
Go to accumarklabs.com and enter the verification code (report id) MDTZ-AFJX. The lab's own record should show lot RET12#05582 with the same dates and results as this page.
Is lot RET12#05582 the newest GLP-3 R - 12mg lot from Paramount Peptides?
It's the most recent GLP-3 R - 12mg certificate we have on file from Paramount Peptides as of Oct 8, 2026. Vendors can ship a newer lot before its certificate is posted, so check your vial label.
Does this certificate apply to my vial?
Only if the lot number printed on your vial reads RET12#05582 exactly. A certificate of analysis covers one lot; it says nothing about other lots of the same product.
Other lots and COAs
GLP-3 R - 12mg at Paramount Peptides
Lab-tested lot RET12#05582 · 99.69% HPLC purity · Accumark Labs
Affiliate disclosure: We earn a commission if you buy through the vendor links on this page, at no extra cost to you. Peptides & Coffee is an independent COA reference and is not owned by or affiliated with the vendors or labs listed. Lab results are published by the vendors and labs; we link to each lab's own verification record so you can check them yourself. Stock and lots change: the vendor may be shipping a newer lot than the one on this page, so check your vial label.