★What is Nonapeptide-1 and how does it work?
Nonapeptide-1 is a synthetic peptide of nine amino acids. It acts as an α-MSH antagonist, binding to MC1 receptors on melanocytes to block melanin production signals before they start.
★How is it different from other whitening ingredients like Vitamin C or Kojic Acid?
Vitamin C and Kojic Acid act downstream on tyrosinase. Nonapeptide-1 works upstream by blocking the hormonal signal (α-MSH) that activates tyrosinase. This prevents pigmentation at the source without irritation.
★Is this peptide listed in China's cosmetic ingredient catalog?
Yes. Nonapeptide-1 is officially listed in China's IECIC (2021 Edition) under sequence number 03642 as a permitted cosmetic ingredient with skin conditioning and hair conditioning functions.
★What is the approved safe usage concentration in China?
China NMPA data shows maximum historical usage: 2% for leave-on products (full body) and 2% for eye area (leave-on) . These concentrations are considered safe for cosmetic use.
★What is the recommended dosage for formulations?
Recommended usage is 5 to 25 ppm (0.0005% – 0.0025%) of active peptide powder. For best results, add during the cooling phase below 40°C at pH 5.0-7.0.
★What is the mechanism behind its skin brightening effect?
It competitively binds to MC1 receptors on melanocytes, preventing α-MSH from activating the melanin synthesis cascade. This downregulates tyrosinase, TRP-1, and MITF gene expression.