Skin / Pigmentation

Darkens skin pigment (used for tanning)

GHK-Cu Copper peptide — skin repair, collagen production, anti-aging
$0.3–$3.0/mg 4.7 (3)
Melanotan II Melanocortin agonist — skin pigmentation and tanning
$0.5–$5.0/mg 3.5 (2)