Dear Sir or Madam: 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 can offer you high quality products, favorable price and enjoyable service. We hope to cooperate and keep business relationship with you .The price is:Mecobalamin-Vitamin B12 3000 USD/KG Cyanocobalamin-Vitamin B12 2000USD/KG 1% Vitamin B12 Feed Additive UV 13USD/KG HPLC 24 USD/KG If You have MSN, tell me please. Thanks and Best regards.Gao Yong