LL-37vsSS-31
LL-37 vs SS-31 — independent comparison of uses, administration, pricing across providers, and key differences. Last reviewed April 21, 2026.
Quick Verdict
Based on clinical evidence and real patient data
The only known human cathelicidin antimicrobial peptide, naturally produced by immune cells and epithelial tissues. LL-37 has broad-spectrum antimicrobial activity alongside potent immunomodulatory and wound-healing properties.
A mitochondria-targeting tetrapeptide that concentrates in the inner mitochondrial membrane, protecting cardiolipin from oxidative damage. Restores mitochondrial function in aged and metabolically stressed cells, with clinical trials in heart failure and Barth syndrome.
Best choice depends on your insurance, budget, and treatment history.Take the quiz to get a personalized recommendation.
LL-37 vs SS-31: At a Glance
Full comparison across all key factors.
| Factor | LL-37ALLY PICK | SS-31 |
|---|---|---|
| Category | recovery | anti-aging |
| Also Known As | Cathelicidin, hCAP18/LL-37 | Elamipretide, Bendavia, MTP-131 |
| Administration | Topical or subcutaneous injection | Subcutaneous injection |
| Prescription | Required | Required |
| Providers | 3 providers✓ Better | 2 providers |
| Common Uses |
|
|
Data sourced from FDA prescribing information and peer-reviewed clinical trials. Prices reflect telehealth platform costs as of April 21, 2026. See our methodology.
Pricing by Provider
2 providers offer both LL-37 and SS-31.
| Provider | LL-37 | SS-31 | Consultation | Lab Testing |
|---|---|---|---|---|
 | $180/monthly | $280/monthly | Video Telehealth | Yes |
 | $240/monthly | $350/monthly | Video Telehealth | Yes |
 | $50/one-time | Not offered | Async Telehealth | No |
Key Differences
LL-37
More ProvidersThe only known human cathelicidin antimicrobial peptide, naturally produced by immune cells and epithelial tissues. LL-37 has broad-spectrum antimicrobial activity alongside potent immunomodulatory and wound-healing properties.
SS-31
A mitochondria-targeting tetrapeptide that concentrates in the inner mitochondrial membrane, protecting cardiolipin from oxidative damage. Restores mitochondrial function in aged and metabolically stressed cells, with clinical trials in heart failure and Barth syndrome.
Which Is Right for You?
Choose LL-37if…
- You want a recovery medication
- You prefer topical or subcutaneous injection administration
- You want more provider options (3 available)
- Your primary goal is antimicrobial defense
- Your primary goal is chronic wound healing
Choose SS-31if…
- You want a anti-aging medication
- You prefer subcutaneous injection administration
- 2 providers available on our platform
- Your primary goal is mitochondrial function
- Your primary goal is cellular energy
Frequently Asked Questions
What is the difference between LL-37 and SS-31?
Which is cheaper, LL-37 or SS-31?
Can I switch from LL-37 to SS-31?
Medical Disclaimer
This comparison is for informational purposes only and does not constitute medical advice. Always consult with a qualified healthcare provider before starting, stopping, or changing any medication. Individual results may vary. The information presented reflects publicly available data and may not account for your specific health situation.