Disclosure: We earn a commission from vendors on this page. Rankings are based on objective criteria including price, COA availability, and reputation.
Best Retatrutide Vendors of 2026
Ranked by Price, Purity, and Reputation
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Quick Comparison
1Ion PeptideCOA
10/10$5.85/mg
2Ascension PeptidesCOA
9.8/10$12.50/mg
3EZ PeptidesCOA
9.5/10$7.80/mg
4Glacier AminosCOA
9.3/10$6.20/mg
5Nura PeptidePREMIUMCOA
9/10$6.92/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
$738.0024mg × 10$3.08/mgCOA
EZ Peptides10-Vial Kit
$1548.0048mg × 10$3.23/mgCOA
EZ Peptides10-Vial Kit
$718.0020mg × 10$3.59/mgCOA
EZ Peptides10-Vial Kit
$588.0012mg × 10$4.90/mgCOA
EZ Peptides10-Vial Kit
$508.0010mg × 10$5.08/mgCOA
Ascension Peptides5-Vial Kit
$470.2510mg × 5$9.40/mgCOA
Ascension Peptides3-Vial Kit
$288.0910mg × 3$9.60/mgCOA
EZ Peptides10-Vial Kit
$338.006mg × 10$5.63/mgCOA
| Vendor | Kit | Kit Price | $/mg | COA | |
|---|---|---|---|---|---|
EZ Peptides | 10-Vial Kit24mg each | $738.00 | $3.08/mg | Yes | |
EZ Peptides | 10-Vial Kit48mg each | $1548.00 | $3.23/mg | Yes | |
EZ Peptides | 10-Vial Kit20mg each | $718.00 | $3.59/mg | Yes | |
EZ Peptides | 10-Vial Kit12mg each | $588.00 | $4.90/mg | Yes | |
EZ Peptides | 10-Vial Kit10mg each | $508.00 | $5.08/mg | Yes | |
Ascension Peptides | 5-Vial Kit10mg each | $470.25 | $9.40/mg | Yes | |
Ascension Peptides | 3-Vial Kit10mg each | $288.09 | $9.60/mg | Yes | |
EZ Peptides | 10-Vial Kit6mg each | $338.00 | $5.63/mg | Yes |
Retatrutide Stacks & Blends
Pre-mixed combinations containing Retatrutide — one vial, multiple peptides.
Retatrutide + Cagrilintide Blend
Also contains: Cagrilintide
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.