There are many types of vitamin B12, but there are four main types, including Methylcobalamin, Adenosylcobalamin, Cyanocobalamin, and Hydroxcobalamin.

 

The effecacy of tablet forms vary for each one

 

the most researched form is Cyanocobalamin, and it is beleived this is the most effective to cureVitamin B12 deficcincy