... 4.compact powde usage,skin whitening The product is water soluble polypeptide formed by degradation of silk ... bone glue protein, gelatin proteins, etc), silk peptide is nutrient-rich but can be easily absorbed by hair ... weight ranges between 500 and 2,000, is better at making membrane, the membrane has nice ... be hardly washed out. This is the theory of the method how the silk peptide can protect the ...