SoWhat'sTheProblem??: IF the issue is a documented vitamin B12 deficiency. Then the issue is whether to take orally or by intramuscular shots or intra-nasally. That depends on if the stomach and intestines can allow absorption into the blood or not. That's usually a function of age (older: less likely; or other serious GI problems). Unless you've ingested cyanide, I don't think there is any other serious consideration
Answered 4/4/2016
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Issue?: please do tell us what exactly the issue is. B12 supplements can be very useful in certain conditions, but they are not a 'cure all'. This being said, they also are fairly harmless, and will not hurt you even if you take them without really needing them.
Answered 12/3/2014
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