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LL-37

FDA: research-only

LL-37 is a cathelicidin antimicrobial peptide involved in innate immunity that destroys bacteria, modulates inflammation, and supports tissue repair. Found naturally in neutrophils and epithelial tissues, it is used for gut healing, skin conditions, and immune rebalancing. Antimicrobial peptide that restores microbiome balance, suppresses fungal overgrowth, and clears bacterial overgrowth. Heals leaky gut and retrains immune tolerance. Destroys bacteria directly while modulating inflammatory response. Found naturally in neutrophils and epithelial tissues. - SIBO treatment and candida/yeast control - Skin conditions (acne, eczema, rosacea) - Post-antibiotic gut restoration - Gut immune healing and leaky gut repair - Food sensitivity reduction -

This content is for educational and research purposes only. VialBase does not provide medical advice. Consult a healthcare professional before using any peptide.

Molecular weight —
Half-life —
CAS number 154947-66-7
Route —

28-day resets featuring LL-37

02

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5mg

10mg

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What bloodwork do I need?

Reference ranges are general guidelines. Consult your physician for interpretation.

PRE-CYCLE
  • CMP
  • CBC with differential
  • CRP
  • ESR
DURING CYCLE
  • CBC with differential
  • CRP
POST-CYCLE
  • CMP
  • CBC
  • CRP
Safety & Regulatory Status
FDA STATUS research-only

Regulatory status for LL-37 may change. Verify current status with your jurisdiction before use. This is not legal or medical advice.

Frequently Asked Questions

What is LL-37?
LL-37 is a cathelicidin antimicrobial peptide involved in innate immunity that destroys bacteria, modulates inflammation, and supports tissue repair. Found naturally in neutrophils and epithelial tissues, it is used for gut healing, skin conditions, and immune rebalancing.
How does LL-37 work?
Antimicrobial peptide that restores microbiome balance, suppresses fungal overgrowth, and clears bacterial overgrowth. Heals leaky gut and retrains immune tolerance. Destroys bacteria directly while modulating inflammatory response.
How is LL-37 dosed?
Systemic: 50-100 mcg SubQ 2-3x/week (cycle 2-3 weeks); Spot dose: 50 mcg SubQ near lesion for acne (not systemic); Gut healing: 50-100 mcg 2-3x/week (inject or oral); Range: 100-500 mcg in research settings; Route: SubQ (spot and systemic), topical. These figures reflect commonly cited research protocols, not medical advice — consult a clinician.
Is LL-37 FDA-approved?
LL-37 is a research-only compound and is not FDA-approved. Research-only — not FDA-approved for human use; Endogenous antimicrobial peptide (naturally occurring); Available through research chemical suppliers.