This content is for educational purposes only. Not medical advice. Always consult a licensed healthcare professional before using any peptides.

Back to Library
ImmuneModerate RiskNot FDA-approved. Endogenous human peptide used in research.

LL-37

The Antimicrobial Shield

LL-37 is a human cathelicidin antimicrobial peptide naturally produced by the immune system. It plays a critical role in innate immunity by directly killing bacteria, disrupting biofilms, and modulating inflammatory responses. Used therapeutically for chronic infections, Lyme disease co-infections, gut dysbiosis, and wound healing in clinical peptide therapy.

If You Take This

  • Broad-spectrum antimicrobial activity against bacteria and fungi
  • Disrupts biofilms (critical for chronic infections)
  • Modulates inflammatory immune response
  • Supports wound healing and tissue repair
  • Effective against antibiotic-resistant organisms
  • Supports gut barrier restoration

Protocol

Dosing
50-100mcg subcutaneous daily. Some protocols use 100mcg daily for acute infections, tapering to 50mcg for maintenance. Inject near affected area when possible.
Cycle Length
4-8 weeks depending on condition. Chronic infection protocols may run 8-12 weeks under practitioner guidance.
Half-Life
4-6 hours
Best Time
Morning or divided AM/PM
Method
Subcutaneous injection

Stacks Well With

BPC-157 (gut healing synergy)Thymosin Alpha-1 (immune synergy)TB-500

Avoid With

Immunosuppressive medications without practitioner oversightCaution in autoimmune conditions

Side Effects

  • Injection site irritation and redness
  • Mild flu-like symptoms initially (Herxheimer reaction possible)
  • Temporary worsening of symptoms as biofilms disrupt
  • Fatigue during initial treatment

Where to Buy

PepStack Price Guarantee

We track prices across 5+ verified vendors so you don't have to. Every vendor is vetted for purity testing, third-party COAs, and shipping reliability.

Prices last verified: April 3, 2026

Ascension Peptides

★ 4.7
BEST PRICE
$2.20
Vial
10mg
Purity
99%+
Shipping
2-4 business days
Status
In Stock
Buy Now →

Core Peptides

★ 4.8
$89.00
Vial
5mg
Purity
99%
Shipping
2-3 business days
Status
In Stock
Buy Now →

We may earn a commission from purchases made through these links at no extra cost to you. This does not influence our recommendations. Learn more

Add to My StackBack to Library

For educational and informational purposes only. Not medical advice. Always consult a healthcare provider before starting any peptide protocol.