... 2.GMP/GMF/KOSHER/HALAL/HACCP 3.Quick Delivery DescriptionVitamin B2 80%,98% could be used as feed/human nutrition,not ... strengthen the immunity in great amoRiboflavin, also known as vitamin B2, Yellow or orange yellow crystalline powder; is the essential necessity ... , it is widely used as food and feed additives. Vitamin B2