Disclosure: We earn a commission from vendors on this page. Rankings are based on objective criteria including price, COA availability, and reputation.
Best PT-141 Vendors of 2026
Ranked by Price, Purity, and Reputation
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Quick Comparison
| Rank | Vendor | COA | Score | Doses |
|---|---|---|---|---|
| 1 | Nura PeptidePREMIUM | Yes | 10/10 | |
| 2 | Ascension Peptides | Yes | 9.8/10 | |
| 3 | Ion Peptide | Yes | 9.5/10 | |
| 4 | EZ Peptides | Yes | 9.3/10 | |
| 5 | Glacier Aminos | Yes | 9/10 |
Bulk Pricing
Per-vendor quantity breaks — pick a vial size to see the bulk price. Must purchase the full pack.
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How We Score Vendors
Our scoring is based on three weighted factors:
Price Competitiveness (40%)
Normalized to cost per milligram for fair comparisons across vial sizes.
COA Availability (30%)
Third-party lab testing confirming purity, identity, and absence of contaminants.
Vendor Reputation (30%)
Community feedback, shipping reliability, customer service, and business track record.
Premium partner. Nura Peptide pays for priority placement on this page. Our affiliate commission, COA verification, and per-mg pricing comparison remain independent — we still surface lower prices from other vendors when applicable. How premium placement works.