What is LL-37?
LL-37 (also written LL 37 or ll37) is the only human cathelicidin, a peptide the immune system uses against microbes.
Labeled vial · actual packaging may differ
CLINICIAN-SUPERVISED CARE
LL-37
A peptide investigated in innate immune biology.
Injectable5 mL vial2mg/ml
LL-37 monthly plan
LL-37 is a human cathelicidin peptide involved in innate immune signaling.
$300/month
- Asynchronous clinical consultation
- Supplies
- Two-day shipping after dispensing
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You'll start your medical questionnaire next. Prescription required. Treatment is subject to medical eligibility, provider approval, pharmacy availability, patient location, and applicable law.
UNDERSTAND THE TREATMENT
What is LL-37?
LL-37 is a human cathelicidin peptide involved in innate immune signaling. Laboratory research into antimicrobial activity is not the same as evidence that an injected product prevents or treats infection.
The starting point is your health history and the reason you are seeking care—not a dosing schedule found online. Your clinician can assess whether a treatment discussion is appropriate and whether a better-studied option makes more sense.
WHAT PEOPLE ASK
LL-37: common questions
What does the research show?
Research is mostly laboratory and animal work on antimicrobial and wound activity. That does not show that injecting it treats infection in people.
What are the risks?
FDA cites insufficient human safety information, potential immune reactions, and nonclinical findings including possible tumor-promoting activity. It is not FDA-approved.
How much does LL-37 cost?
LL-37 is $300 a month on a one-month plan. That includes the online consultation, the clinician review, supplies, and two-day shipping once the pharmacy dispenses. Three-, six- and twelve-month plans are offered at checkout. If the clinician decides treatment is not appropriate for you, your payment is refunded. See what peptide pricing includes.
Can I get LL-37 online?
Yes, through a clinician review. You complete an online health assessment, a licensed clinician reviews it (a phone call may be needed) and decides whether LL-37 is appropriate. If it is prescribed, a licensed U.S. compounding pharmacy prepares it and ships it to you. Peps RX serves patients in all 50 states; a prescription is never guaranteed.
NO FINE-PRINT MATH
Exactly what is listed.
The formulation, the vial, and the monthly price—kept separate, so you can compare clearly.
Specifications are not dosing instructions. Follow only the directions provided by your clinician and dispensing pharmacy.
- Formulation
- LL-37
- Listed strength
- 2mg/ml
- Vial volume
- 5 mL
- Total API per vial
- 10 mg
- Monthly plan price
- $300/month
Quality you can check
What a licensed U.S. compounding pharmacy means for your prescription, and what it does not.
Prepared for one patient
Peps RX prescriptions are compounded by a state-licensed U.S. 503A pharmacy for the individual patient named on the prescription. That is a different pathway from products sold “for research use only,” which are not made or labeled for use in people.
Sterile compounding standards
Injectable preparations are sterile preparations. USP <797> is the national standard for compounding them, covering cleanroom conditions, personnel garbing, and beyond-use dating, and state boards of pharmacy enforce it.
What compounding does not mean
Compounded drugs are not FDA-approved. FDA does not review them for safety, effectiveness, or quality before they are dispensed, and state boards of pharmacy are primarily responsible for overseeing 503A pharmacies.
Check the pharmacy yourself
Your prescription label names the dispensing pharmacy. You can confirm its license on that state’s board of pharmacy website. How to verify a compounding pharmacy.
HOW IT WORKS
Your Next Chapter in 3 Simple Steps
Health Assessment
Tell us about your preferences, goals, medications, and health history to see if LL-37 may be right for you.
Clinician-Prescribed Plan
A state-licensed clinician reviews your intake and, if appropriate, creates a LL-37 treatment plan personalized for you.*
Sustain Your Success
If prescribed, your LL-37 treatment is prepared by a licensed pharmacy and shipped to your home with supplies. Follow the instructions provided by your clinician and pharmacy.
*Results may vary. All prescription-grade therapies require a prescription from a licensed provider and are prepared by licensed pharmacies. Compounded medications are not FDA-approved, and the FDA does not review them for safety, efficacy, or quality. Medical guidance is provided solely by healthcare professionals, not Peps RX or its distributors. Content is for informational purposes only and should not be taken as medical advice, diagnosis, or treatment.
THE DETAILS MATTER
Good questions. Clear answers.
What does the $300 monthly price include?
The displayed monthly price includes the asynchronous consultation, supplies, and two-day shipping after dispensing. Your medical questionnaire starts the process; a licensed clinician independently determines whether treatment is appropriate.
How much LL-37 should I use?
Your dose is determined by the prescribing clinician from your intake form, health history, current medications, and the reason you are seeking care. The strengths listed on this page are product specifications, not instructions for use. Do not calculate a protocol from this catalog or combine treatments without an individualized clinical review.
How long will this vial last?
How long a vial lasts depends on the prescribed dose, schedule, formulation, and pharmacy instructions. The monthly price shown on this page describes the care plan; follow the fulfillment and use directions provided by your clinician and pharmacy.
Is LL-37 FDA-approved?
LL-37 is not FDA-approved. FDA cites insufficient human safety information, potential immune reactions, and nonclinical findings involving reproductive effects and possible tumor-promoting activity in some tissues. These concerns need explicit clinical consideration.
When will my order arrive?
The listed price includes two-day shipping once the pharmacy dispenses and ships an approved prescription. It does not mean delivery two days after your first visit. Review, preparation, location, and carrier conditions affect the overall timeline.
KEEP EXPLORING
Related reading. Not a protocol.
These products share a research topic. They are not a recommendation to combine treatments.
Product images show the labeled vial for identification; actual pharmacy packaging may differ. Listed strengths are specifications, not dosing instructions.
Ready to begin?
Start the clinician review process for LL-37.
If prescribed, your treatment ships FREE to all 50 states.