Nonapeptide-1 vs GHK
Side-by-side comparison of key properties, dosing, and research.
Skin & Cosmetic
Nonapeptide-1Skin & CosmeticAnti-Aging & Longevity
GHK- Summary
- Nonapeptide-1 is a synthetic 9-amino acid peptide that inhibits melanin production by blocking α-MSH (alpha-melanocyte stimulating hormone) receptor binding. Used in cosmetic formulations for skin lightening and evening skin tone, it is particularly effective for UV-induced and hormonal hyperpigmentation.
- GHK is the natural tripeptide (Gly-His-Lys) released from human albumin that activates tissue remodeling, collagen synthesis, and anti-aging gene expression. The copper-free form is the biological signaling molecule; it chelates copper in tissue to form GHK-Cu but also has independent biological activity.
- Half-Life
- Not applicable (topical)
- Extremely short as free peptide; tissue binding extends local effects
- Admin Route
- Topical
- SubQ, Topical, Oral
- Research
- —
- —
- Typical Dose
- 0.05–0.5% concentration in formulation
- 100–500 mcg
- Frequency
- Twice daily
- Daily or 5x per week
- Key Benefits
- Inhibits UV-induced tanning and hyperpigmentation
- Reduces hormonal melasma
- Evens skin tone at receptor level
- Well-tolerated with minimal irritation
- Complementary to tyrosinase inhibitors for enhanced brightening
- Reduces post-inflammatory hyperpigmentation
- Stimulates collagen and extracellular matrix synthesis
- Activates tissue repair gene expression programs
- Anti-aging: reverses 57% of age-related gene changes
- Antioxidant and anti-inflammatory
- Wound healing and skin barrier repair
- Improves skin laxity, texture, and radiance
- Neuroprotective (stimulates NGF, BDNF)
- Anti-fibrotic in liver and lung models
- Side Effects
- Generally very well-tolerated
- Rare contact sensitivity in susceptible individuals
- Theoretical risk of excessive depigmentation with prolonged high-concentration use
- Excellent safety profile (naturally occurring peptide)
- Rare: mild injection site reaction (SC)
- No significant adverse effects identified in research
- Stacks With
- —
- —