Definitions of the product:

The product is the water soluble mixing amino acid obtained after hydrolysis of Silk fibroin. The average molecular weight is about 90 and the product is also called as “Silk 90”. The product is white powder with pH value between 5 to 7 and positive ninhydrin reaction.

?

?

?

Items	Index (Food Grade)	Index (Common Grade)
Appearance	White or jasmine powder, soluble in water, sweet taste.	White or jasmine powder, soluble in water, sweet taste.
Differentiation	positive ninhydrin reaction	positive ninhydrin reaction
Total nitrogen	≥15%	≥14.5%
Weight Loss on drying	≤2.5%	≤4%
Residue on ignition	≤3.0%	≤5%
pH value	5.0-7.0	5.0-7.0
Total Glycin, L-alanine, L-serine	≥85%	≥82%
Heavy Metal ( as Pb)	≤5ppm	≤10ppm
As	≤0.5ppm	≤1ppm
Bacteria	≤100	≤100
Coli group (MPN)（pieces/100g）	≤30	≤30
Pathogenic Bacteria	No detection	No detection

?

Application characteristics:

?

?

2.?Glycin and serine can not only be used as the essential materials of synthesizing protein in organism, but also be used as the predecessor of synthesizing the glutathione (GSH, SSG), which has certain preventive actions on heart disease and cancer. Meanwhile, the glycin also has the detoxication effects for some aromatics which can cause cancer. The rich alanine also helps promoting the metabolism of alcohol in human body and protecting liver. Moreover, tyrosine has obvious effect on preventing the old from Alzheimer disease.

?

3.? Silk amino acid is very easy to permeate the derma layer of skin and get absorbed, nurturing skin as well. Due to its action in the enzyme metabolism, silk amino acid can keep and adjust moisture, prevent skin from ultraviolet radiation, restrain splash generation, facilitate anti-aging for skin.