Is sh-Polypeptide-4 natural?

Produced by fermenting genetically engineered E. coli that express a human-identical protein sequence. The resulting protein is a biological fermentation product built entirely from natural amino acids.

A protein ingredient made by growing genetically engineered bacteria that produce a human-identical protein through fermentation. Used in skincare for its antioxidant and skin- and hair-conditioning properties.

CosIng definition: sh-Polypeptide-4 is a single chain synthetic human peptide, produced by fermentation in E. coli. The starting gene is a synthesized copy of the human gene which codes for Stem Cell Factor used as such or adapted to the production host. It contains a maximum of 273 amino acids which may contain disulfide bonds and/or glycosylation. The protein consists of the proper sequence of the 20 standard amino acids.