What is the evidence for LL-37?
LL-37 is an important endogenous host-defense peptide, but complex pro-inflammatory, anti-inflammatory, antimicrobial, and cytotoxic actions make simple immune-support claims misleading.
DIRECT ANSWER
LL-37 evidence summary.
LL-37 is an important endogenous host-defense peptide, but complex pro-inflammatory, anti-inflammatory, antimicrobial, and cytotoxic actions make simple immune-support claims misleading.
Reviewed August 8, 2026. Each statement links to its evidence record, followed by the primary and official sources used for this answer.
The human peptide is well characterized biologically, but a reliable clinical efficacy program for marketed LL-37 products was not identified.
Open evidence recordAntimicrobial, inflammatory, and cytotoxic effects are extensively studied in laboratory systems.
Open evidence recordDescribing an endogenous function does not establish that administering a manufactured product is safe or beneficial.
Open evidence recordPRIMARY & OFFICIAL SOURCES
Sources for this answer.
3 source records, with duplicates removed.