Immune Modulator

LL-37

Also known as: Cathelicidin

LL-37 is the only human cathelicidin antimicrobial peptide — a 37-amino-acid peptide (starting with two leucines) cleaved from the hCAP-18 precursor. It has broad-spectrum antimicrobial activity and immunomodulatory roles, but is also implicated in the pathogenesis of autoimmune and inflammatory skin diseases including psoriasis, rosacea, and lupus. Not FDA-approved; research-use only.

Vendors carrying LL-37

0 listings, ranked by trust score

Each row is a (vendor, peptide) pair. Click through for the listing detail, the vendor's full trust profile, and any COAs they've published.

No vendors carrying this peptide are indexed yet.

Independent evidence

COAs for LL-37

19 third-party tests across 6 vendors. Each card links to the full report.

All 19 COAs for LL-37 →
99.64 %
May 2026
Janoshik Analytical · HPLC

For

LL-37

by Verified Peptides· batch LL05260305C

99.93 %
Jan 2026
Freedom Diagnostics · HPLC

For

LL-37

by Simple Peptide· batch L1-05-01162026-J

99.93 %
Jan 2026
Freedom Diagnostics · HPLC

For

LL-37

by Simple Peptide· batch LL10-37011220236-J

99.70 %
Jan 2026
Freedom Diagnostics · HPLC

For

LL-37

by MedGe Peptides· batch LL375LT12

99.70 %
Jan 2026
Freedom Diagnostics · HPLC

For

LL-37

by MedGe Peptides· batch LL375LT12

99.84 %
Jan 2026
Freedom Diagnostics · HPLC

For

LL-37

by Simple Peptide· batch LL37L2092025-J

99.65 %
Oct 2025
Chromate · HPLC

For

LL-37

by Mile High Compounds· batch LL3-005-MH-01

99.80 %
Oct 2025
MDx BioAnalytical Laboratory · HPLC

For

LL-37

by BioLongevity Labs· batch 251549

99.75 %
Oct 2025
Janoshik Analytical · HPLC

For

LL-37

by Skye Peptides· batch LL25-04-002

99.50 %
Aug 2025
Freedom Diagnostics · HPLC

For

LL-37

by Simple Peptide· batch LL3708202025-J

99.61 %
Jul 2025
Freedom Diagnostics · HPLC

For

LL-37

by Simple Peptide· batch LL3705072025-J

99.94 %
Mar 2025
BioRegen · HPLC

For

LL-37

by BioLongevity Labs· batch cmojb7o9z01dakirxmbk61guw

99.36 %
Mar 2025
Janoshik Analytical · HPLC

For

LL-37

by Skye Peptides· batch LL25-04-001

99.64 %
Jan 2025
Janoshik Analytical · HPLC

For

LL-37

by Verified Peptides· batch 12-24-0105A

Nov 2025

Purity not on file

BioRegen

For

LL-37

by BioLongevity Labs· batch 16-3-45954

Oct 2025

Purity not on file

Janoshik Analytical

For

LL-37

by Skye Peptides· batch LL25-04-002

Oct 2025

Purity not on file

Janoshik Analytical

For

LL-37

by Skye Peptides· batch LL25-04-002

Apr 2025

Purity not on file

Janoshik Analytical

For

LL-37

by Skye Peptides· batch LL25-04-001

Feb 2025

Purity not on file

Janoshik Analytical

For

LL-37

by Verified Peptides· batch 12-24-0105A