Is sh-Nonapeptide-4 natural?

Fermentation-derived or hydrolysate amino acids are assembled by solid-phase peptide synthesis to match a segment of human Klotho, and reagents leave no mass. No alternative route is commercially significant.

A nine-amino-acid peptide made in a laboratory to match part of a human protein called Klotho. It is listed as a skin-conditioning ingredient. It is built from amino acids, which are generally obtained by fermentation or by breaking down proteins.

CosIng definition: sh-Nonapeptide-4 is a single chain human peptide produced synthetically to be identical to a portion of the protein, Klotho, and contains 9 amino acids consisting of aspartic acid, cysteine, glycine, isoleucine, proline, serine and tyrosine. Klotho contains a maximum of 1012 amino acids consisting of the proper sequence of the 20 standard amino acids.