As the Original vb12 Manufacturer in China, we (North China Pharmaceutical KANGXIN CO., LTD.) can provide Vb12 in high quality with low price. Cyanocobalamin-vitamin B 12 CP/BP/USP/EP Packing: 1000g/tin 500g/tin 100g/tin Certificate we obtain: GB/T 24001~ISO 14001:1996 GB/T 19001~ISO 9001:2000 Kosher-certification GMP SA8000 we are applying for COS certificate .