Found this about b12 injectable

[rymasm]

[quote]Are there any side effects or interactions?
Oral vitamin B12 supplements are not generally associated with any side effects.

Although quite rare, serious allergic reactions to injections of vitamin B12 (sometimes even life-threatening) have been reported.29 30 Whether these reactions are to the vitamin itself, or to preservatives or other substances in the injectable vitamin B12 solution, remains somewhat unclear. Most, but not all, injectable vitamin B12 contains preservatives.[quote]



...has anyone ever had any problems with a b12 injectable? is there not a good oral on the market that works as well as an injectable?

[unclemoney]

It would take alot more b12 in pill form to get the same in liquid, plus your liver kills off alot of the oral form and I havn't ran into problems with the injectible b12. Also there's always going to be people who have adverse side effects to certain things. Just like my 1 cousin is alergic to peanuts and there's some people that have bad reactions from just taking tylenol, so...