That is why tests like methylmalonic acid (4) tend to be much more accurate than serum B12 levels
### Seek treatment If you have a B12 deficiency, your healthcare provider may recommend one or more of the following treatment protocols [1]: - Vitamin B12 injection For some patients, the root cause of their B12 deficiency is their bodys difficulty in absorbing and retaining the B12 they consume through food
Excellent sources include liver, oily fish (salmon, mackerel), meat, eggs, and dairy
In other contexts, a trial of high-dose oral therapy is reasonable and less invasive
I wish you well I respect your judgement over mine, but I haven't found any deterioration in ampoules that have been stored in the dark but are a year beyond their date
Vitamin B12 is also important for DNA synthesis and cell maturation