We are offering vitamin b12 application:medical aspects1.for the treatment and prevention of vitamin b12 deficiency;2.for gastrectomy or malabsorption syndrome, prevention of anemia caused by vitamin b12 deficiency;3.the need for vitamin b12 increased in the use of vitamin in the patients with the consumption of the disease, hyperthyroidism, pregnancy, lactation, etc_4.the nutrition and anaemia in pregnancy;5.the broad tapeworm disease anemia;6.the liver disorder anemia;7.the radiation induced neutropenia;8.the nerve pain, muscle pain, joint pain;9.peripheral neuritis, peripheral nerve paralysis.Food additive1.it can be used as a food colorant, such as ham, sausage, ice cream, fish sauce;2.for the cosmetics, soap, toothpaste, etc., can also be used for toilet, refrigerator, such as oral odor, remove sulfide and aldehyde odor.Feed additive1.vitamin b12 deficiency caused by pig, chicken growth and development and anemia;2.local wasting disease in the area of cattle and sheep;3.the treatment of nonspecific neuritis, neuralgia etc.;4.to improve the utilization rate of feed protein;5.raising economic animal;6.the use of b12 solution of eggs or fish, fish in the water can improve the toxic substances such as benzene and heavy metal tolerance.