Our company is the biggest factory that produces VB12, not agent. . Our company has more than 1000 staffs and our productivity is 12 tons per year .You can see more information in our company web: www.hebyufeng.com. , you will know our company clearly. We adopt world-advanced equipment and technology, guided by some authoritative experts have produced vitamin B12 for more than 10 years. We closely cooperate with universities and institutes, guaranteeing the best quality. We can offer you competitive price and enjoyable service. Hope we can establish a good business relationship whenever we can. The price is: Cyanocobalamin- (Assay>98.5%, Related substances<2%, Loss on drying<3%), 2150USD/KG Mecobalamin- (JPXIV), 3200 USD/KG 1% Vitamin B12 Feed Additive: UV 15USD/KG HPLC 25USD/KG