What it is
Conchiolin is the structural protein component of nacre (mother-of-pearl) and mollusk shells; hydrolyzing it breaks the protein into smaller water-soluble peptides and amino acids. In cosmetics these fragments act as a skin-conditioning agent that helps the surface feel smooth and can form a light moisture-binding film. It is most often included at low levels in Japanese and Korean formulas marketed around a pearl or hydration theme.
Safety & warnings
Generally well tolerated at the low concentrations used in cosmetics. Because it is an animal-derived protein hydrolysate, individuals with shellfish or mollusk allergies may wish to use caution. It is not a plant oil and is not associated with comedogenicity.
Origin & sourcing
Derived from natural marine sources, typically pearl or oyster/mollusk shell, processed by hydrolysis into a soluble protein fraction.
Questions everyone asks
What is hydrolyzed conchiolin protein made from?
It is made from conchiolin, the natural protein matrix of pearl and mollusk shell, which is broken down by hydrolysis into smaller water-soluble peptides and amino acids.
What does it do in a sunscreen?
It functions as a skin-conditioning humectant and light film former, contributing to a smooth feel and helping bind moisture at the skin surface.