Disclosure: We earn a commission from vendors on this page. Rankings are based on objective criteria including price, COA availability, and reputation.
Tirzepatide
Best Tirzepatide Vendors of 2026
Ranked by Price, Purity, and Reputation
5 vendors comparedfrom $1.40/mgCOA-verified sources only
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Quick Comparison
1Nura PeptideCOA
10/10$4.00/mg
2Ion PeptideCOA
9.8/10$3.62/mg
3Ascension PeptidesCOA
9.5/10$5.33/mg
4Glacier AminosCOA
9.3/10$3.27/mg
5EZ PeptidesCOA
9/10$1.80/mg
| Rank | Vendor | COA | Score | Doses |
|---|---|---|---|---|
| 1 | Nura Peptide | Yes | 10/10 | |
| 2 | Ion Peptide | Yes | 9.8/10 | |
| 3 | Ascension Peptides | Yes | 9.5/10 | |
| 4 | Glacier Aminos | Yes | 9.3/10 | |
| 5 | EZ Peptides | Yes | 9/10 |
Bulk Pricing
Per-vendor quantity breaks — pick a vial size to see the bulk price. Must purchase the full pack.
Nura PeptideCOA30% code thepeptidecatalog
as low as $2.00/mg$1710.0060mg × 10$2.85/mg → $2.00/mg with code
View at Nura PeptideIon PeptideCOA15% code thepeptidecatalog
as low as $1.27/mg$1492.50100mg × 10$1.49/mg → $1.27/mg with code
View at Ion PeptideAscension PeptidesCOA
as low as $2.40/mg$1440.0030mg × 10$4.80/mg → $2.40/mg auto-applied
View at Ascension PeptidesGlacier AminosCOA10% code thepeptidecatalog
as low as $1.90/mg$1267.4060mg × 10$2.11/mg → $1.90/mg with code
View at Glacier AminosEZ PeptidesCOA10% code thepeptidecatalog
as low as $1.13/mg$760.0060mg × 10$1.27/mg → $1.14/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.