vitamin b12 injection syringe size Needle | B12 Syringes smallest needle for b12 injection

In general, vitamin B12 deficiency occurs in pernicious anemia, following surgical removal of the stomach, with fish tapeworm, or due to bowel cancer

For keeping vitamin B12 levels up, a common dose is 1000 mcg (1 mg) once a month

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I've since bought up-to-date ampoules and, having various symptoms which may be related to low levels, I've decided to do alt days for a couple of weeks, then back to 2-3 monthly