LL-37
Written by Alejandro Reyes
Founder & Lead Researcher
Reviewed by Peptide Nerds Editorial · Updated April 2026
Key Takeaway
LL-37 is a human antimicrobial peptide (cathelicidin) that plays a key role in innate immune defense against bacteria, viruses, and fungi.
| Type | Healing & Recovery |
| FDA Status | Research Only |
| Evidence Level | Preliminary |
| Typical Dose | 50-100 mcg daily |
| Frequency | Once daily |
| Key Goals | healing, inflammation |
How it works
Disrupts microbial cell membranes and modulates immune response. Promotes wound healing and has direct antimicrobial activity.
Benefits
- Antimicrobial defense
- Immune modulation
- Wound healing support
Side effects
- Injection site irritation
- Limited human data outside natural production
Dosing protocol
Typical Dose
50-100 mcg daily
Frequency
Once daily
Not FDA-approved. Used primarily in research contexts.
Deeper on LL-37
Full breakdowns of every part of the LL-37 research base.
What you will need
Basic supplies for reconstitution and subcutaneous injection.
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Bacteriostatic Water (30mL)
$8-15Required for reconstituting lyophilized peptides. 30mL is standard.
Insulin Syringes (1mL, 29ga)
$12-20 (100ct)1mL insulin syringes with 29-gauge needles for subcutaneous injection.
Alcohol Prep Pads
$5-10 (200ct)Sterile 70% isopropyl alcohol wipes for injection site prep.
Sharps Container
$8-15FDA-cleared sharps disposal container for used needles.
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Stacks with LL-37
Goals
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Medical Disclaimer: This content is for informational and educational purposes only. It is not intended as medical advice or a substitute for professional medical consultation, diagnosis, or treatment. Always consult a qualified healthcare provider before starting any peptide protocol.