====== Combalamin ======

Cobalamin may refer to several chemical forms of vitamin B12, depending on the upper axial ligand of the cobalt ion. These are:

  * Cyanocobalamin (R = –CN)
  * Hydroxocobalamin (R = –OH)
  * Methylcobalamin (R = –CH3), an active form of vitamin B12
  * Adenosylcobalamin (R = –Ado), also an active form of vitamin B12
  * 
Cobalamin is susceptible to acid. During its biosynthesis, complexes are formed which protect it. ([[https://en.wikipedia.org/wiki/Cobalamin|source]])

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