Disclosure: We earn a commission from vendors on this page. Rankings are based on objective criteria including price, COA availability, and reputation.
Best LL-37 Vendors of 2026
Ranked by Price, Purity, and Reputation
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Quick Comparison
1Ascension PeptidesCOA
10/1010mg$8.90/mg
2Ion PeptideCOA
9.5/105mg$9.00/mg
3EZ PeptidesCOA
9/1010mg$7.80/mg
| Rank | Vendor | COA | Score | Doses |
|---|---|---|---|---|
| 1 | Ascension Peptides | Yes | 10/10 | |
| 2 | Ion Peptide | Yes | 9.5/10 | |
| 3 | 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.
Ascension PeptidesCOA
as low as $4.00/mg$801.0010mg × 10$8.01/mg → $4.00/mg auto-applied
View at Ascension PeptidesIon PeptideCOA15% code thepeptidecatalog
as low as $5.74/mg$337.505mg × 10$6.75/mg → $5.74/mg with code
View at Ion PeptideEZ PeptidesCOA10% code thepeptidecatalog
as low as $6.32/mg$702.0010mg × 10$7.02/mg → $6.32/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.