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how long does a vitamin b12 injection take to work Injections in Oakland, CA — FACE How Long Does It Take
Description
RESEARCH USE ONLY Not for human or veterinary use

Vitamin B12 is essential but its overdose can cause more harm than good

Regarding the form of vitamin B12 used, cyanocobalamin was the most common (n = 14), followed by methylcobalamin (n = 6), hydroxocobalamin (n = 4), and combinations including adenosylcobalamin in isolated cases

Pregnancy Pregnancy Category C Adequate and well-controlled studies have not been done in pregnant women
Since B12 is water-soluble, your body excretes what it doesnt use, making it generally safe, even in higher doses [*]
