Description
LL-37 is the only cathelicidin antimicrobial peptide produced by humans and a key molecule in innate immunity research. Limitless Life Nootropics supplies it as a 5mg vial, made in the USA and independently tested.
What Is LL-37?
The peptide is cleaved from a larger precursor protein called hCAP-18. Its name reflects its structure: it begins with two leucine residues (LL) and is 37 amino acids long. It forms an amphipathic alpha-helix that can insert into and disrupt the membranes of bacteria, fungi and some viruses.
Beyond direct antimicrobial activity, research has shown that it influences immune cell recruitment, cytokine release, wound healing and the formation of new blood vessels. It has been studied in models of skin infection, biofilm formation, chronic wounds and inflammatory disease.
Premium lyophilized and Non-Lyophilized grades are offered at 5mg. The product may contain trehalose as a lyoprotectant.
Research Applications
Published preclinical work has examined this peptide across several areas of investigation:
- Membrane disruption of bacteria and fungi
- Biofilm formation and disruption
- Chronic wound healing models
- Immune cell chemotaxis and cytokines
- Angiogenesis in tissue repair
Researchers can review peer-reviewed studies on this cathelicidin through the National Library of Medicine (PubMed) database.
LL-37 Specifications
| Product | LL-37 |
|---|---|
| Compound type | 37-amino-acid cathelicidin antimicrobial peptide |
| Available sizes | 5mg |
| Format | Lyophilized (freeze-dried) powder in a sealed glass vial |
| Purity | ≥99% (HPLC verified) |
| Origin | Manufactured in the USA |
| Testing | Independent third-party lab |
| Intended use | Laboratory research only |
The Limitless Life Nootropics Standard
Independent researchers, university groups and private laboratories rely on Limitless Life Nootropics for consistent quality and responsive service. Every listing includes accurate format and size information, our compounds are stored under controlled conditions until they ship, and we stand behind every order. If something is not right, our U.S.-based support team will make it right.
Quality and Third-Party Testing
Every batch of this peptide sold by Limitless Life Nootropics is produced in the United States and verified by an independent third-party laboratory. Testing includes HPLC purity analysis and mass spectrometry identity confirmation, and a certificate of analysis is available for each lot so researchers can document exactly what they are working with.
Storage and Handling of LL-37
Unopened lyophilized this peptide remains most stable when frozen at -20°C and protected from light. After reconstitution with a suitable diluent, refrigerate at 2–8°C and avoid repeated freeze-thaw cycles.
Need supplies? Pair your order with our reconstitution solution and sterile 10 mL vials for convenient preparation.
How Ordering Works
We know research timelines are tight. Most orders ship within one to two business days from our U.S. facility, packed discreetly and tracked from dispatch to delivery. Checkout is encrypted, and our support team can help with documentation, order status or bulk quantities for ongoing projects.
Related Research Products
Teams working with this peptide often explore KPV, KPV Capsules and BPC-157. Browse the full Gastrointestinal Research and Immune Research collections, or view every compound in our research peptide catalog at Limitless Life Nootropics.
Frequently Asked Questions
Where does the name come from?
It starts with two leucine residues (LL) and is 37 amino acids long.
What size is available?
Each vial contains 5mg.
Is LL-37 for human use?
No. It is sold strictly for laboratory research. It is not intended for human or animal consumption, diagnosis or treatment.
Where can I buy LL-37 online?
You can order it directly from Limitless Life Nootropics, a U.S. supplier of third-party tested research peptides with fast, discreet shipping.
Research Use Only
All products sold by Limitless Life Nootropics are intended strictly for in-vitro laboratory research and scientific study. This product is not a drug, food, supplement or cosmetic, has not been evaluated by the FDA, and is not for human or veterinary use. Purchase is limited to qualified researchers aged 21 and over.
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