Extracted from fresh animal skin or bone strictly according to the Chinese national standard QB2732-2005.There are many grades of protein with different protein content to meet your various needs,such as,protein content from 91% to 98%.They are high in the Molecular weight and low in Microelement,such as,Arsenic,Sulphur dioxide,Chloride,ect.The most important is that it has buffer ability to Acid and alkali so it effect well in the metal electrolytic,animal feed production and fruit milk,drinking,cosmetic,bonny or diet food,instant noodle,or amino acid granules.