How Is LL-37 Tested?
LL-37 is verified by independent third-party analysis — a five-point panel with a batch-specific Certificate of Analysis.
01Verification
Every lot of LL-37 is analyzed by an independent third-party laboratory — MZ Biolabs, in Tucson, Arizona — before release. Testing is separate from production, so purity and identity are confirmed by a third party, not self-reported.
02The Five-Point Panel
| Purity | Reverse-phase HPLC · ≥99% |
| Identity | Mass spectrometry vs. 4,493.3 g/mol |
| Endotoxin | LAL assay |
| Heavy metals | ICP-MS |
| Sterility | Bioburden |
03FAQ
How is LL-37 tested?
Every Ethos Bio lot of LL-37 is analyzed by an independent third-party laboratory (MZ Biolabs, Arizona) on a five-point panel: reverse-phase HPLC purity, mass-spectrometry identity, endotoxin (LAL), heavy metals (ICP-MS), and sterility or bioburden.
What purity standard does LL-37 meet?
LL-37 is released to a specification of ≥99% purity by reverse-phase HPLC, with identity confirmed by mass spectrometry against its molecular weight of 4,493.3 g/mol.
Does LL-37 come with a Certificate of Analysis?
Yes. A batch-specific Certificate of Analysis corresponding to the exact lot of LL-37 you receive ships with every order and is mirrored to your researcher account.