Hello I recently tested for Active B12, My result has come back at 120 when the range is 20-108. I have looked into what a high active B12 might suggest and am a little worried by the answers - serious diseases including liver disease and cancers. In particular there is mention of a type of blood cancer called a myeloproliferative neoplasm. Both my nan and my mum have this kind of cancer as it runs in our family. Anyone had raised active B12?