The 19 US vendors listed on The Peptide Plug, ordered by the independent testing they publish. 7 publish purity, endotoxin and heavy-metals testing on every batch. The order is by testing only — no vendor pays for placement, and price plays no part.
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| Vendor | Purity | Endotoxin | Heavy metals | Peptides |
|---|---|---|---|---|
| Crush Research | Every batch | Every batch | Every batch | 42 |
| FirstForm Peptides | Every batch | Every batch | Every batch | 32 |
| Forge Performance | Every batch | Every batch | Every batch | 23 |
| Glacier Aminos | Every batch | Every batch | Every batch | 69 |
| PADRE Research | Every batch | Every batch | Every batch | 9 |
| Peptide Partners | Every batch | Every batch | Every batch | 25 |
| Virtus Peptides | Every batch | Every batch | Every batch | 7 |
| Modern Aminos | Every batch | Every batch | Some batches | 67 |
| Orbitrex | Every batch | Every batch | Some batches | 50 |
| PeptidePlugs | Every batch | Every batch | Some batches | 67 |
| Puratek Peptides | Every batch | Every batch | Some batches | 37 |
| Regenerative Research | Every batch | Every batch | Some batches | 22 |
| Blank Peptides | Every batch | Every batch | Not published | 33 |
| Proved Peptides | Every batch | Every batch | Not published | 3 |
| Revitalized Research | Every batch | Every batch | Not published | 16 |
| TAGS Compounds | Every batch | Every batch | Not published | 6 |
| Peptide Supply Co | Every batch | Some batches | Not published | 75 |
| Real Peptides | Every batch | Some batches | Not published | 55 |
| Your Protocol capsules only | Every batch | Not published | Not published | 8 |
"Every batch" and "some batches" reflect what each vendor publishes; older inventory can predate a vendor's current testing, so confirm the certificate of analysis for your batch on the product page. US vendors must publish independent third-party testing for purity and endotoxins (capsule-only brands are assessed on other factors). "Peptides" is how many we currently track at that vendor.
Compare prices across these vendors →Of the 19 US vendors listed on The Peptide Plug, all publish independent third-party purity testing on every batch. 16 publish endotoxin testing on every batch and 2 on some batches; 7 publish heavy-metals testing on every batch and 5 on some batches.
Crush Research, FirstForm Peptides, Forge Performance, Glacier Aminos, PADRE Research, Peptide Partners and Virtus Peptides publish all three on every batch.
On every batch: Crush Research, FirstForm Peptides, Forge Performance, Glacier Aminos, PADRE Research, Peptide Partners, Virtus Peptides, Modern Aminos, Orbitrex, PeptidePlugs, Puratek Peptides, Regenerative Research, Blank Peptides, Proved Peptides, Revitalized Research and TAGS Compounds. On some batches: Peptide Supply Co and Real Peptides.
On every batch: Crush Research, FirstForm Peptides, Forge Performance, Glacier Aminos, PADRE Research, Peptide Partners and Virtus Peptides. On some batches: Modern Aminos, Orbitrex, PeptidePlugs, Puratek Peptides and Regenerative Research.