Decapeptide-12 vs LL-37
Side-by-side comparison of key properties, dosing, and research.
Skin & Cosmetic
Decapeptide-12Immune SupportRecovery & Repair
LL-37- Summary
- Decapeptide-12 is a synthetic 10-amino acid peptide developed for skin brightening and depigmentation. It selectively inhibits tyrosinase activity and downstream melanogenesis pathways, reducing hyperpigmentation, dark spots, and uneven skin tone without the irritation associated with hydroquinone.
- LL-37 is the only known human cathelicidin antimicrobial peptide. It kills bacteria, fungi, and viruses by disrupting their membranes, while simultaneously modulating immune responses. Used for antimicrobial protection, immune priming, and wound healing.
- Half-Life
- Not applicable (topical)
- Very short (~1–2 hours) in plasma due to protease degradation; topical use bypasses systemic clearance
- Admin Route
- Topical
- SubQ, Topical, Intranasal
- Research
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- Typical Dose
- 5 ppm (0.0005%) concentration
- 100–300 mcg
- Frequency
- Twice daily (AM and PM)
- 2–3x per week
- Key Benefits
- Reduces hyperpigmentation and dark spots
- Evens skin tone and improves radiance
- Inhibits post-inflammatory hyperpigmentation
- Well-tolerated alternative to hydroquinone
- Effective for melasma and age spots
- Non-cytotoxic to melanocytes
- Broad-spectrum antimicrobial (bacteria, fungi, viruses)
- Promotes wound healing and angiogenesis
- Immune system modulation — enhances innate immunity
- Reduces LPS-mediated endotoxemia
- Anti-biofilm activity against resistant organisms
- Promotes tissue regeneration and keratinocyte migration
- May protect against sepsis
- Side Effects
- Generally very well-tolerated
- Rare mild irritation or sensitivity in some skin types
- Results may take several weeks to become visible
- Injection site redness and irritation
- Mild inflammatory response at injection site
- Potential pro-inflammatory at high doses
- Rare: fever or flu-like symptoms at initiation
- Stacks With
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