LL-37vsMK-677
LL-37 vs MK-677 — 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.
An oral growth hormone secretagogue that mimics the action of ghrelin, stimulating growth hormone release from the pituitary gland. Unlike injectable peptides, MK-677 is taken orally and has a long half-life.
Best choice depends on your insurance, budget, and treatment history.Take the quiz to get a personalized recommendation.
LL-37 vs MK-677: At a Glance
Full comparison across all key factors.
| Factor | LL-37 | MK-677ALLY PICK |
|---|---|---|
| Category | recovery | growth-hormone |
| Also Known As | Cathelicidin, hCAP18/LL-37 | Ibutamoren |
| Administration | Topical or subcutaneous injection | Oral capsule |
| Prescription | Required | Required |
| Providers | 3 providers | 6 providers✓ Better |
| Common Uses |
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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
3 providers offer both LL-37 and MK-677.
| Provider | LL-37 | MK-677 | Consultation | Lab Testing |
|---|---|---|---|---|
 | $50/one-time | $50/one-time | Async Telehealth | No |
 | $180/monthly | $120/monthly | Video Telehealth | Yes |
 | $240/monthly | $180/monthly | Video Telehealth | Yes |
 | Not offered | $150/monthly | Video Telehealth | Yes |
 | Not offered | $149/monthly | Async Telehealth | Yes |
 | Not offered | $149/monthly | Video Telehealth | Yes |
Key Differences
LL-37
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.
MK-677
More ProvidersAn oral growth hormone secretagogue that mimics the action of ghrelin, stimulating growth hormone release from the pituitary gland. Unlike injectable peptides, MK-677 is taken orally and has a long half-life.
Which Is Right for You?
Choose LL-37if…
- You want a recovery medication
- You prefer topical or subcutaneous injection administration
- 3 providers available on our platform
- Your primary goal is antimicrobial defense
- Your primary goal is chronic wound healing
Choose MK-677if…
- You want a growth-hormone medication
- You prefer oral capsule administration
- You want more provider options (6 available)
- Your primary goal is growth hormone elevation
- Your primary goal is improved sleep quality
Frequently Asked Questions
What is the difference between LL-37 and MK-677?
Which is cheaper, LL-37 or MK-677?
Can I switch from LL-37 to MK-677?
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.