Ningxia Duowei Pharmaceutical

Ningxia Duowei Pharmaceutical is a leading Chinese pharmaceutical manufacturer based in Yinchuan, Ningxia, specializing in Active Pharmaceutical Ingredients (APIs) and finished drug products. The company is globally recognized as one of the largest producers of Vitamin B12 (cyanocobalamin) and its derivatives, including mecobalamin and adenosylcobalamin. Its extensive product portfolio serves both the human healthcare and animal nutrition markets, featuring a variety of vitamins, antibiotics, and feed additives. Operating large-scale, GMP-compliant fermentation and synthesis facilities, Duowei exports its products to over 50 countries worldwide. The firm plays a critical role in the global supply chain for essential nutritional supplements and metabolic medicines.