Endothelin-1 vs Hexapeptide-9
Head-to-head comparison of Endothelin-1 (Endothelin-1) and Hexapeptide-9 (Hexapeptide-9) — benefits, dosing, side effects, research data, and where to buy.
Research Score
| Property | Endothelin-1 | Hexapeptide-9 |
|---|---|---|
| Category | Skin & Cosmetic | Skin & Cosmetic |
| Full Name | Endothelin-1 | Hexapeptide-9 |
| Molecular Weight | 2493 Da | 681.7 Da |
| Half-Life | ~2–10 minutes | N/A |
| Amino Acids | 21 | 6 |
| Typical Dose | 1–100 nM | 0.01-1% in cosmetic formulations |
| Route | In vitro / ex vivo | Topical |
| Purity | ≥98% | ≥98% |
| Studies Count | 350 | 12 |
| Research Status | Pre-clinical | Pre-clinical |
Endothelin-1 Benefits
- ✓Stimulates melanocyte activity
- ✓Supports melanosome transfer studies
- ✓Useful in UV-induced pigmentation research
- ✓Links vascular and pigment signaling
Hexapeptide-9 Benefits
- ✓skin-repair support
- ✓collagen-matrix support
- ✓fine-line appearance reduction
- ✓topical rejuvenation
Endothelin-1 Dosing
1 nM exposure|10 nM exposure|100 nM exposure
Hexapeptide-9 Dosing
Topical serum/cream 0.01-1%|Apply once or twice daily|Use consistently for visible cosmetic effects
Endothelin-1 Side Effects
- ⚠Vasoconstriction
- ⚠Cell-stress signaling at high concentrations
- ⚠Inflammatory cross-talk
Hexapeptide-9 Side Effects
- ⚠mild redness
- ⚠temporary stinging
- ⚠sensitivity in reactive skin
Research Overview
Endothelin-1
Endothelin-1 is one of the best-studied non-melanocortin regulators of pigmentation in human skin. It is strongly associated with UV-induced tanning responses and pigment disorder biology.
Hexapeptide-9
Hexapeptide-9 appears in scientific and cosmetic literature related to wound repair, cell migration, and extracellular matrix support. The evidence base is smaller than for more established peptides, but it is a real research-backed cosmetic ingredient.
Ready to buy?
Find both peptides from our verified, lab-tested vendors with purity certificates and third-party testing.