Disclosure: We earn a commission from vendors on this page. Rankings are based on objective criteria including price, COA availability, and reputation.
Best Tirzepatide Vendors of 2026
Ranked by Price, Purity, and Reputation
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Quick Comparison
1Ion PeptideCOA
10/10$3.62/mg
2Ascension PeptidesCOA
9.8/10$3.67/mg
3EZ PeptidesCOA
9.5/10$3.27/mg
4Glacier AminosCOA
9.3/10$3.27/mg
5Nura PeptidePREMIUMCOA
9/10$5.67/mg
| Rank | Vendor | COA | Score | Doses |
|---|---|---|---|---|
| 1 | Ion Peptide | Yes | 10/10 | |
| 2 | Ascension Peptides | Yes | 9.8/10 | |
| 3 | EZ Peptides | Yes | 9.5/10 | |
| 4 | Glacier Aminos | Yes | 9.3/10 | |
| 5 | Nura PeptidePREMIUM | Yes | 9/10 |
Bulk Kits
Multi-vial kits at a lower $/mg — must purchase the full kit.
EZ Peptides10-Vial Kit
$888.0060mg × 10$1.48/mgCOA
EZ Peptides10-Vial Kit
$588.0030mg × 10$1.96/mgCOA
EZ Peptides10-Vial Kit
$518.0020mg × 10$2.59/mgCOA
EZ Peptides10-Vial Kit
$458.0015mg × 10$3.05/mgCOA
EZ Peptides10-Vial Kit
$348.0010mg × 10$3.48/mgCOA
| Vendor | Kit | Kit Price | $/mg | COA | |
|---|---|---|---|---|---|
EZ Peptides | 10-Vial Kit60mg each | $888.00 | $1.48/mg | Yes | |
EZ Peptides | 10-Vial Kit30mg each | $588.00 | $1.96/mg | Yes | |
EZ Peptides | 10-Vial Kit20mg each | $518.00 | $2.59/mg | Yes | |
EZ Peptides | 10-Vial Kit15mg each | $458.00 | $3.05/mg | Yes | |
EZ Peptides | 10-Vial Kit10mg each | $348.00 | $3.48/mg | Yes |
Compare 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.