Retrieved from (licensed in all 50 states) Bean, M
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You're pregnant or plan on becoming pregnant while using B12 injections
However, some people cannot take vitamin B12 injections safely, including those with Lebers disease or similar eye concerns, kidney disease, liver disease, iron or folic acid deficiency, an active infection, or those taking medications that may interact with vitamin B12
These generally show continued safety, but definitive long-term studies don't exist