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Myeloproliferative neoplasms (such as polycythaemia vera or chronic myeloid leukaemia) and acute leukaemias can increase B12-binding proteins (transcobalamins), raising total serum B12

This information is not specific medical advice and does not replace information you receive from your health care provider

B12 is an important nutrient that is often used as a nutritional supplement, even by those without a B12 deficiency

Niemals einfrieren-auftauen wiederholen jeder Zyklus reduziert die Wirkstoffintegritt

That's in addition to, as mentioned by Gambit, excess alcohol causing issues with the liver which is the primary bodily store of B12