KLOW vs LL-37
Which should you choose? Here's what you need to know.
The short answer
KLOW and LL-37 are both immune / inflammation peptides, but they work differently. A multi-peptide blend sold for gut and immune support. Composition varies between vendors — check the COA before comparing prices. 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 20 Sep 2026 Peptide Compare tracked 44 vendors selling KLOW, cheapest in stock $0.875 per mg at Modern Research, and 39 selling LL-37, cheapest $5.40 per mg at Alpha Omega.
KLOW
Immune / InflammationA multi-peptide blend sold for gut and immune support. Composition varies between vendors — check the COA before comparing prices.
LL-37
Immune / InflammationThe only human cathelicidin antimicrobial peptide. Plays a key role in innate immune defense against bacterial, viral, and fungal infections.
Price & availability
Once you've decided which peptide fits your needs, here's how they compare on price and vendor options. Prices verified Sep 20, 2026.
KLOW
LL-37
$69.99
Starting from
$34.99
$7.20
Avg. price per mg
$17.22
44
Vendors selling it
39
47 options
In stock now
38 options
9.1/10
Top trust score
9.0/10
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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.