LL-37
peptideAntimicrobial research peptide
Research status · Not FDA-approved
Not FDA-approved; a research peptide. Human evidence for supplemental use is limited. Verify legality/sourcing.
LL-37 is a naturally occurring antimicrobial peptide studied in immune and wound-context research. It is not approved for human use, and supplemental-use evidence is limited — clinician guidance is essential.
How it works
A human cathelicidin peptide with roles in innate immunity and antimicrobial defense (largely preclinical for supplemental use).
Commonly discussed use cases
- Immune/wound research (discussed)
Supposed / potential benefits
- Roles studied in research settings — not established as a supplement
Common side effects
- Injection-site reactions
- Limited human safety data
Warnings & contraindications
- Not FDA-approved; human safety/efficacy not established
- Unregulated sourcing risk
Typical timing considerations
No established regimen; any use should be clinician-directed.
Administration route
Subcutaneous injection
Storage
Refrigerate after reconstitution; follow instructions.
Questions to ask your clinician
- What human evidence exists for my goal?
- How would we monitor safety?
Commonly tracked in Reta
Tracking fields organize user-entered, clinician-directed routines — Reta never recommends or computes doses.
Track this in Reta
Beta members get a ready-made tracker for LL-37 — schedule, dose log, injection-site rotation, reminders, and check-ins — for organizing a clinician-directed routine. Personal tracking is available to everyone during the Public Beta.
Reta is a tracking and education tool — not a medical provider. Nothing here is a diagnosis, treatment, prescription, or dosing recommendation. Peptides and medications should only be used under the direction of a licensed clinician. Talk to a qualified clinician before starting, stopping, combining, or changing anything. Many compounds below are not FDA-approved for human use; some are investigational or sold through unregulated channels where purity and dosing are not guaranteed.