Pharmaceutical Grade: group : 1. Cyanocobalamin-vitamin B 12 CP/BP/USP/EP Packing: 1000g/tin 500g/tin 100g/tin 2. Mecobalanmin-vitamin B12 JPXIV Packing: 1000g/tin 500g/tin 100g/tin 3. Hydroxocobalamin-vitamin B12 BP Packing: 1000g/tin 500g/tin 100g/tin 4. Cobamamide-vitamin B12 CP Packing: 1000g/tin 100g/tin