... purification processes on the basis of food grade A Grade. It has much higher purity, white particles, good gloss, and ... food grade S Grade increased granulation process, after the granulation process, products has even granule, good flowability and solubility, high purity and ... a cool, dry place, avoid sunlight and high temperatureShelf Life:2 years 2012 High Purity Fish Collagen Food Grade S Grade