is a liver
supplement used in few cases of liver dysfunction and mecanerv is methyl cobalamine.
Low b12 levels can have varied reasons like
Worm infestation -D. Latum in some geographical locations
Although there are not many side effects from the use of these medications , but I will advise you to get the proper investigations done to rule out the actual cause of vitamin B12 deficiency
. Inject able forms are mostly used for treatment of B12 deficiency.