LL-37
otherLL-37 is a research-use-only peptide. PeptideSource compares suppliers on purity, COAs, and price-per-mg.
Also known as: Cathelicidin, CAP-18, LL37
LL-37, also known as Cathelicidin, is an antimicrobial peptide naturally found in the human immune system. It acts by disrupting the membranes of bacteria, thus providing a potent defense against infections. LL-37 first drew attention for its role in innate immunity, sparking interest in its potential applications in infectious disease research. The peptide's ability to modulate inflammation and promote wound healing further expanded its research scope. Today, it is primarily studied for its effects on:
- Infection control
- Wound healing
- Inflammatory modulation
- Antimicrobial resistance
Additionally, LL-37 is being investigated for its potential in cancer therapy.
PeptideSource editorial · Updated Jul 18, 2026
For research use only. PeptideSource does not sell peptides directly. Compare third-party supplier listings at your own discretion.
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| Product | LL-37 | LL-37 | LL-37 | LL-37 | LL-37 | LL-37 Non-Lyophilized | LL-37 CAP-18 | LL-37 | LL-37 | LL-37 Premium | LL-37 | LL-37 CAP-18 |
| Size | 5 mg | 5 mg | 5 mg | 5 mg | 5 mg | 5 mg | 5 mg | 5 mg | 5 mg | 5 mg | 5 mg | |
| Price | $39.00 | $39.99 | $47.00 | $56.25 | $65.70 | $67.50 | $71.99 | $74.00 | $79.00 | $82.50 | $86.00 | $95.00 |
| Price/mg | $7.80/mg | $8.00/mg | $9.40/mg | $11.25/mg | $13.14/mg | $13.50/mg | $14.40/mg | $14.80/mg | $15.80/mg | $16.50/mg | $17.20/mg | $19.00/mg |
| Price change | 0% (10d) | 0% (10d) | 0% (10d) | 0% (10d) | 0% (16d) | 0% (16d) | 0% (16d) | 0% (10d) | 0% (10d) | 0% (16d) | 0% (16d) | 0% (10d) |
| Stock | In stock | In stock | In stock | In stock | In stock | In stock | In stock | In stock | In stock | In stock | In stock | In stock |
| Shipping | US shipping | UPS 2nd Day Air | Same-day dispatch before 12PM CT | 2–3 days | 2–5 days | 5–7 days | 3–5 days | Same or next-day shipping | Same-day dispatch before 12PM EST | 5–7 days | Same-day dispatch | Same/next-day dispatch |
| Reviews | 5.0(9) | 5.0(6) | 4.6(63) | 5.0(22) | 4.8(271) | 4.3(159) | 2.6(12) | 4.2(46) | 5.0(1) | 4.3(159) | 4.9(15) | 1.0(4) |
| Purity | 99% | 99% | — | 99% | — | 99% | 99% | — | — | 99% | 99% | 99% |
| COA | — | — | — | — | — | — | ||||||
| Bulk discount | — | — | 10% off (3+) | — | — | — | — | — | — | — | — | — |
