Treatment review · Peptide · 2026
LL-37
Host-defense peptide discussed for immune and antimicrobial support.
- Editorial score
- 6.7/10
- Community interest (editorial)
- 7.1/10
- Estimated cost per vial
- $120–$280
- Providers with related programs
- 0in our directory
Both scores are PeakedLabs editorial assessments — community interest reflects our read of discussion volume and demand, not user ratings. Cost ranges are editorial estimates, not quotes or purchasable offers. A related program does not confirm that a clinic offers this specific treatment or that it is appropriate for you.
How it works
“Think of it as sending a targeted text message to specific cells to speed up repair or signaling.”
Mechanism of action
Acts on innate immunity and antimicrobial peptide pathways.
Typical dosing
100-250 mcg daily in short 2-6 week cycles.
Protocols vary by clinic and individual labs. Dose with a licensed clinician, not a forum thread.
Common use cases
- 01immune support
- 02infection resilience
- 03wound healing
Side effects
- fatigue
- flu-like symptoms
- injection pain
Legal & regulatory status
- FDA status
- Compounding category dependent
Specialty compounded use where permitted.
Post-February 2026 update: many injectable peptides are now subject to tighter compounding enforcement, so pharmacy and state compliance checks are essential before starting treatment.
Provider research
No direct provider matches in our current directory for this treatment yet.
Disclosure: PeakedLabs may earn a commission from partner links. Editorial scoring and rankings remain independent.
Experts covering this treatment
Expert directoryExpert links for this treatment are being expanded.
The PeakedLabs guide · $29, one-time
The Complete Guide to Peptide Therapy
Bring a clearer set of questions to your clinician conversation. The 69-page research guide explains its evidence, provider-check and cost framework; the separate eight-page printable workbook gives you space to record your goal, unresolved questions, written costs and agreed follow-up. $29 USD once for both PDFs.
September 5, 2026 research edition.
Educational, AI-assisted research; no independent licensed clinician review. No dosing, mixing or injection instructions.
Related treatments
Frequently asked questions
What is LL-37 usually used for?
LL-37 is typically discussed for immune support, infection resilience, wound healing. Provider availability is limited in our current directory.
How is LL-37 commonly dosed?
Common protocols reported by clinics and patients: 100-250 mcg daily in short 2-6 week cycles. Always individualize with a licensed clinician.
Is LL-37 legal in the U.S.?
Specialty compounded use where permitted. Post-February 2026 update: many injectable peptides are now subject to tighter compounding enforcement, so pharmacy and state compliance checks are essential before starting treatment.
What side effects should I watch for with LL-37?
Commonly reported effects include fatigue, flu-like symptoms, injection pain. Escalate any severe or persistent symptoms to your care team quickly.
Treatment Planning
Match Treatment Choice to Provider Execution
Choose providers with reliable monitoring and refill workflows for this treatment category.
Disclosure: PeakedLabs may earn a commission from partner links. Editorial scoring and rankings remain independent.