LL-37 vs PNC-27
Which should you choose? Here's what you need to know.
The short answer
LL-37 and PNC-27 are both immune / inflammation peptides, but they work differently. The only human cathelicidin antimicrobial peptide. Plays a key role in innate immune defense against bacterial, viral, and fungal infections. Compare vendor pricing and availability below.
On 9 Oct 2026 Peptide Compare tracked 39 vendors selling LL-37, cheapest in stock $5.40 per mg at Alpha Omega, and 14 selling PNC-27, cheapest $7.00 per mg at AMC Essentials.
LL-37
Immune / InflammationThe only human cathelicidin antimicrobial peptide. Plays a key role in innate immune defense against bacterial, viral, and fungal infections.
PNC-27
Immune / InflammationPrice & availability
Once you've decided which peptide fits your needs, here's how they compare on price and vendor options. Prices verified Oct 9, 2026.
LL-37
PNC-27
$34.99
Starting from
$34.99
$16.93
Avg. price per mg
$17.76
39
Vendors selling it
14
38 options
In stock now
10 options
9.0/10
Top trust score
7.6/10
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Our top-rated vendor for each, based on trust scores, purity testing, and price.
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Where does this data come from?
We re-check vendor prices continuously and score vendors on Finnrick blind-test results — samples bought anonymously and sent to a lab, not vendor claims. No vendor can pay to rank higher. See our full methodology.