Certain factors may theoretically affect B12 absorption
Saline or Sterile Water A carrier solution to ensure safe and effective delivery of the vitamin
Peroxiredoxin 2 and peroxide metabolism in the erythrocyte
Besides, consistently higher paracetamol regimen may minimize all problems related to possible variations from animal to animal and from time to time in a given animal and invariably link paracetamol action with seizures, severely damaged brain tissue, hepatomegaly, fatty liver and necrosis, breakdown of liver function with profoundly increased ammonia, AST and ALT levels

NHS Diagnosis: Vitamin B12 or folate deficiency anaemia In particular, this paper explains that A particular drawback of testing vitamin B12 levels is that the current widely used blood test only measures the total amount of vitamin B12 in the blood This means it measures forms of vitamin B12 that are active and can be used by the body, as well as the bound or inactive forms, which cannot be used by the body If a significant amount of the vitamin B12 in the patients blood is inactive, a blood test may show normal B12 levels, even though the patient cannot use much of it and might have Vitamin B12 deficiency This is why its important for symptoms to be taken into account when a diagnosis is made