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Best LL-37 Vendors of 2026
Ranked by Price, Purity, and Reputation
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Quick Comparison
1Ion Peptide
10/10$38.25$45.00
5mg$7.65/mgCOA2BioLongevity Labs
9.1/10$94.97
5mg$18.99/mgCOA3Swiss ChemsShips Worldwide
9/10$71.99
5mg$14.40/mgCOA4Penguin Peptides
8.8/10$92.00
5mg$18.40/mgCOA5Limitless Biotech
8.7/10$57.38$67.50
5mg$11.48/mgCOACompare 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.