99%+ Purity
COA Included
Sealed Vials
LL-37
Antimicrobial peptide for immune support
Antimicrobial
Key Benefits
- Broad-spectrum antimicrobial research applications
- Supports natural wound healing processes
- Dual antimicrobial and immunomodulatory mechanisms
- Membrane disruption research potential
- Natural human innate immune peptide
- Antibiotic-resistant infection research applications
- Tissue repair and regeneration studies
Want to purchase this peptide?
Your Body's Natural Defense System—Finally at Full Strength
Most people's innate immune defenses are running at half capacity, leaving them vulnerable to infections and slow healing. LL-37 is the missing piece—your body's own antimicrobial peptide that clears pathogens while accelerating tissue repair. It's like upgrading your immune system to work the way it did when you were younger.
Innate immunity / Cathelicidin antimicrobial pathway (membrane disruption, immunomodulation)
About LL-37
LL-37 is the sole human cathelicidin peptide, naturally produced by immune cells as your first line of defense against infections. It works through dual mechanisms—directly destroying harmful microorganisms by disrupting their cell membranes while simultaneously signaling your immune system to enhance healing and tissue repair. This makes it particularly valuable for addressing both acute infections and chronic conditions where natural LL-37 production has declined.
Who It's For
Ideal for individuals dealing with recurrent infections, slow wound healing, or compromised immune function where the body's natural antimicrobial defenses need reinforcement. LL-37 represents a fundamental approach to immune optimization—supporting the mechanisms your body already uses rather than introducing foreign compounds. It integrates well into comprehensive protocols focused on restoring and maintaining robust immune function over time.
Research Background
LL-37 represents the only member of the cathelicidin family of antimicrobial peptides found in humans, making it a unique component of our innate immune system. This naturally occurring peptide is produced by various cells including neutrophils, epithelial cells, and macrophages as part of the body's first-line defense against microbial infections. Research has focused on two primary areas: 1) Direct antimicrobial activity through bacterial membrane disruption, and 2) Immunomodulatory functions that help coordinate immune responses and promote tissue healing.
Current research directions emphasize LL-37's potential as a therapeutic agent for antibiotic-resistant infections and chronic wound healing. Scientists are particularly interested in its dual mechanism - while conventional antibiotics typically target specific bacterial processes, LL-37's membrane-disrupting action makes it difficult for bacteria to develop resistance. Additionally, its ability to stimulate wound healing and modulate inflammatory responses has attracted attention for treating conditions where tissue repair is compromised, such as diabetic ulcers and other chronic wounds where natural LL-37 production may be insufficient.
Dosing Protocol
| Level | Dose | |
|---|---|---|
Beginner | 50-100 mcg | |
Intermediate | 100 mcg 2x/day | |
Advanced | 200-300 mcg | |
Maximum | 250 mg 2x/day |
Select a dosing level and click Calculate to plan your protocol.
Vials Required
4
16.8 mg needed ÷ 5 per vial
Total Investment
$190
$47.50 per vial
Per Dose
0.02 mL
2 units on U-100 syringe
Doses per Vial
50
5 ÷ 0.10 mg/dose
* Calculations based on standard reconstitution protocols. Consult research guidelines for specific applications.
Educational Resources
Download educational materials and research documentation for LL-37.
LL-37 Cheat Sheet
Dosing protocols, reconstitution & storage guide
Featured in These Stacks
Immunity Basic Stack – Foundation
Immunity
The foundational immunity stack built on Thymosin Alpha-1 and LL-37 establishes core immune competence by enhancing both adaptive and innate defense systems. Thymosin Alpha-1 improves immune coordination and T-cell response, while LL-37 provides direct antimicrobial action and innate immune signaling. This pairing creates a clean, efficient baseline—stronger detection, faster response, and better pathogen clearance without unnecessary complexity. It’s the minimum effective dose for a high-functioning immune system.
Includes
Immunity Next Level – Systemic + Cellular Intelligence
Immunity
The next-level stack moves beyond traditional immunity into full-system optimization by integrating metabolic control, neuroimmune signaling, and cellular repair. Anchored by Thymosin Alpha-1, LL-37, and KPV, it expands with Retatrutide, VIP, ARA-290, and thymic/brain bioregulators. This creates an adaptive, intelligent immune system that is tightly integrated with metabolism, nervous system signaling, and long-term cellular health. It’s no longer just defense—it’s system-wide optimization.
Includes
Immunity Intermediate Stack – Regulation + Repair
Immunity
The intermediate stack builds on the foundation by adding tissue repair and systemic resilience through BPC-157 and Thymosin Beta-4. While Thymosin Alpha-1 and LL-37 handle immune activation and pathogen defense, this layer ensures the body can recover quickly and maintain structural integrity—especially in the gut and soft tissue. The result is a more durable immune system that not only fights effectively but also heals faster and operates with less collateral damage.
Includes
Immunity Advanced Stack – Immune Optimization + Inflammation Control
Immunity
The advanced stack introduces precision control by adding KPV (KLOW), transforming the system from reactive immunity into regulated immunity. While the base layers drive immune activation and repair, KPV ensures inflammation is controlled and does not become destructive. This creates a balanced immune system—aggressive when needed, but capable of shutting down quickly and cleanly—reducing chronic inflammation and improving long-term health outcomes.
Includes
Compliance & Disclaimer
This product is intended for laboratory research purposes only. Not for human consumption. All products are sold with the understanding that the purchaser will comply with all applicable local, state, and federal laws regarding the purchase and use of research chemicals. Certificate of Analysis available upon request.
