Peptide RankingGLP-1 class listings: public certificates of analysis
18 public certificates for GLP-1 class listings from 10 suppliers, opened without an account and recorded with lot, laboratory, date, purity and method. 13 more suppliers list GLP-1 class listings without a certificate we could open for it.
The issuing laboratories are Janoshik (9), Freedom Diagnostics (2), Kovera Labs (2), Bioviridian (1), Vanguard Laboratory (1) and MZ Biolabs (1); 2 documents name no laboratory. Methods printed: HPLC+MS, HPLC. Reported purity runs from 99.02% to 99.85% on the 8 documents that state one. Dates run from 2023-07-05 to 2026-10-16. We index what the supplier publishes; we do not verify documents with the laboratory. How to read a certificate · Lot-level vs sample testing.
Suppliers with a public GLP-1 class listings certificate
| Supplier | Score | Certificates | With lot | Laboratories | Newest | |
|---|---|---|---|---|---|---|
 Paramount Peptides | 76/100 | 5 | 5 | Janoshik | 2026-04-14 | Register |
| Prime Peptides | 59/100 | 3 | 3 | Janoshik Analytical, Vanguard Laboratory | 2026-04-28 | Register |
 Geo Peptides | 48/100 | 2 | 0 | Not named | — | Register |
 Eternal Peptides | 22/100 | 2 | 0 | Kovera Labs | — | Register |
 Pure Peptide Labs | 74/100 | 1 | 1 | Freedom Diagnostics | 2026-08-11 | Register |
 Evolve Peptides | 70/100 | 1 | 1 | Janoshik | 2024-10-21 | Register |
| Peptide Pros | 63/100 | 1 | 1 | MZ Biolabs | 2023-07-05 | Register |
 Peptide Warehouse | 61/100 | 1 | 1 | Freedom Diagnostics | 2026-10-16 | Register |
 Loti Labs | 58/100 | 1 | 0 | Bioviridian | 2026-06-29 | Register |
 Atomik Labz | 39/100 | 1 | 1 | Janoshik | 2026-02-02 | Register |
All 18 certificates
| Supplier | Product | Lot | Laboratory | Date | Purity | Method | Type | |
|---|---|---|---|---|---|---|---|---|
| Peptide Warehouse | GLP-1 (S) 5mg | Accession 2610140072 | Freedom Diagnostics | 2026-10-16 | 99.57% | HPLC+MS | Open | |
| Pure Peptide Labs | GLP-1 SG | SM5320 | Freedom Diagnostics | 2026-08-11 | 99.85% | — | page | Open |
| Loti Labs | Semaglutide 5mg | — | Bioviridian | 2026-06-29 | 99.8% | — | Open | |
| Prime Peptides | Semaglutide · Teal cap | 2242026SM | Janoshik Analytical | 2026-04-28 | 99.172% | HPLC | page | Open |
| Prime Peptides | Semaglutide · White cap | 3142026SM | Janoshik Analytical | 2026-04-28 | 99.751% | HPLC | page | Open |
| Paramount Peptides | GLP-1 S 20mg | SR20N031726 | Janoshik | 2026-04-14 | — | — | image | Open |
| Prime Peptides | Semaglutide 5 mg · Green cap | 2122026SM | Vanguard Laboratory | 2026-03-25 | 99.02% | HPLC | Open | |
| Paramount Peptides | GLP-1 S 50mg | SLIM50N022026 | Janoshik | 2026-03-05 | — | — | image | Open |
| Atomik Labz | Peptide 1 (S) – 5mg | SEM501212026 | Janoshik | 2026-02-02 | 99.835% | — | image | Open |
| Paramount Peptides | GLP-1 S 10mg | S10N111625 | Janoshik | 2025-11-25 | — | — | image | Open |
| Paramount Peptides | GLP-1 S 5mg | S5N101125 | Janoshik | 2025-10-22 | — | — | image | Open |
| Paramount Peptides | GLP-1 S 2mg | SEM2N12032024 | Janoshik | 2024-12-14 | — | — | image | Open |
| Evolve Peptides | Semaglutide 5 mg | 51008 | Janoshik | 2024-10-21 | — | — | page | Open |
| Peptide Pros | Semaglutide 5mg | 2023-06-22 | MZ Biolabs | 2023-07-05 | 99.4% | HPLC+MS | Open | |
| Geo Peptides | Semaglutide 10mg | — | Not named | — | — | — | image | Open |
| Geo Peptides | Semaglutide 20mg | — | Not named | — | — | — | image | Open |
| Eternal Peptides | EP-1 (S) 5mg | — | Kovera Labs | — | — | — | page | Open |
| Eternal Peptides | EP-1 (S) 10mg | — | Kovera Labs | — | — | — | page | Open |
Laboratory coverage for GLP-1 class listings
Prices and the peptide page
The GLP-1 class listings page lists every supplier and listing with price per milligram; size comparisons: 5 mg (15 suppliers, median $69.90) · 10 mg (14 suppliers, median $90.00) · 20 mg (8 suppliers, median $158). COA database · Laboratories · Lot lookup.
Frequently asked questions
Which suppliers publish a certificate of analysis for GLP-1 class listings?
10 suppliers in our index publish at least one public certificate for GLP-1 class listings: Paramount Peptides (5), Prime Peptides (3), Geo Peptides (2), Eternal Peptides (2), Pure Peptide Labs (1), Evolve Peptides (1), Peptide Pros (1), Peptide Warehouse (1) and others listed in the table. 13 further suppliers list GLP-1 class listings without a certificate we could open for it.
Which laboratories test GLP-1 class listings for these suppliers?
Janoshik (9 certificates, 4 suppliers); Freedom Diagnostics (2 certificates, 2 suppliers); Kovera Labs (2 certificates, 1 supplier); Bioviridian (1 certificate, 1 supplier); Vanguard Laboratory (1 certificate, 1 supplier); MZ Biolabs (1 certificate, 1 supplier). 2 documents name no laboratory.
Are the GLP-1 class listings certificates lot-specific?
13 of the 18 certificates print a lot number, and the dates printed run from 2023-07-05 to 2026-10-16. A certificate without a lot number describes a sample, not the vial you receive; match the lot on the document to the label.
All listed materials are for laboratory research use only. A certificate describes the sample the laboratory received. Download the register (CSV) · Request a correction.