Cheapest LL-37 Prices UK

About LL-37

LL-37 is the only human cathelicidin antimicrobial peptide, with a large literature covering direct antimicrobial activity, wound healing and immune modulation, alongside less flattering work on its role in inflammatory skin disease.

At 37 residues it is long by research-peptide standards, and synthesis quality varies noticeably between suppliers as a result.

What moves the LL-37 price

Three things move the LL-37 price you see in the table above: how much active material a 5mg vial actually contains once excipients and salt content are accounted for, whether the supplier funds independent analysis on every batch rather than once a year, and how the vial is packed and shipped. Long cationic peptides bind readily to glass and plastic, so vial and handling specification affects how much active material you actually recover. Compare price per milligram rather than price per vial, and discount any listing whose certificate is undated, unsigned, or tied to a different batch number than the one on the label.

How we independently rank every supplier

Every supplier in this table is scored independently, and no vendor can pay to appear, move up, or have a poor result removed. We build a score out of ten from four weighted inputs: published third-party analytical documentation and how completely it covers the catalogue, identity verification of the company behind the website, the volume and consistency of moderated customer reviews collected through CheckALab, and operational signals such as dispatch reliability, stock accuracy and complaint handling.

For LL-37 specifically we weight the documentation input according to how the compound fails: long cationic peptides bind readily to glass and plastic, so vial and handling specification affects how much active material you actually recover. Suppliers publishing analysis that addresses that point score higher than suppliers publishing a headline purity figure alone. Reviews only count once they clear moderation, and no single review can move a score, so a burst of unusually positive or negative feedback cannot reposition a supplier. Scores are recalculated as new certificates, reviews and delivery data arrive.

How to buy LL-37 cheaply without cutting corners

The lowest headline price is rarely the best value. Compare price per mg rather than price per vial, check whether a batch-matched certificate of analysis is published, and factor in delivery. A cheap vial with no third-party testing behind it is not a saving.

Kensington Labs currently sits at the top of this table at £30 for a 5mg vial, and holds a CheckALab score of 9.43/10.