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
1Nura PeptideCOA
10/1010mg$4.00/mg
2Ascension PeptidesCOA
9.8/1010mg$4.90/mg
3Ion PeptideCOA
9.5/1010mg$3.70/mg
4EZ PeptidesCOA
9.3/1010mg$4.40/mg
5Glacier AminosCOA
9/10$4.10/mg
| Rank | Vendor | COA | Score | Doses |
|---|---|---|---|---|
| 1 | Nura Peptide | 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.
Ascension PeptidesCOA
as low as $2.21/mg$441.0010mg × 10$4.41/mg → $2.21/mg auto-applied
View at Ascension PeptidesGlacier AminosCOA10% code thepeptidecatalog
as low as $2.58/mg$368.9010mg × 10$3.69/mg → $3.32/mg with code
View at Glacier AminosNura PeptideCOA25% code thepeptidecatalog
as low as $2.70/mg$360.0010mg × 10$3.60/mg → $2.70/mg with code
View at Nura PeptideEZ PeptidesCOA10% code thepeptidecatalog
as low as $3.56/mg$396.0010mg × 10$3.96/mg → $3.56/mg with code
View at EZ PeptidesCompare More Peptide Vendors
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.