Definition Silk amino acid (SAAs) also known as silk fibroin ,is a natural water-soluble amino acid powder with glycine, alanine and serine content of more than 85% ,it is extracted from raw silk and produced through series process of silk degumming, enzymolysis , acidolysis and dried. The average molecular weight is about 90 ,also named as silk fibroin-90. products specification: Appearance White powder Total Nitrogen 16% min GLY+ALA+SER 85% min Heavy metal 5ppm max Total amino acid 90% min PH 5-7 Water Solubility 100%
