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
Bulk Kits
Multi-vial kits at a lower $/mg — must purchase the full kit.
| Vendor | Kit | Kit Price | $/mg | COA | |
|---|---|---|---|---|---|
EZ Peptides | 10-Vial Kit30mg each | $529.20$588.00 | $1.76/mg | Yes | View Kit10% OFF |
Ascension Peptides | 10-Vial Kit30mg each | $590.00$1180.00 | $1.97/mg | Yes | View Kit50% OFF |
EZ Peptides | 10-Vial Kit20mg each | $466.20$518.00 | $2.33/mg | Yes | View Kit10% OFF |
EZ Peptides | 10-Vial Kit15mg each | $412.20$458.00 | $2.75/mg | Yes | View Kit10% OFF |
Ascension Peptides | 10-Vial Kit10mg each | $290.00$580.00 | $2.90/mg | Yes | View Kit50% OFF |
EZ Peptides | 10-Vial Kit10mg each | $313.20$348.00 | $3.13/mg | Yes | View Kit10% OFF |
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.