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Its primary advantage over sterile water for injection is its multi-use capability the benzyl alcohol preservative allows the same vial to be accessed multiple times with a sterile needle without compromising the sterility of the remaining solution, which is essential in research settings where a single stock solution vial may be used across multiple experiments or time points

Vitamin B12 is used when there are cases of constipation

Store in original packaging Vials that come in boxes or protective packaging should remain there

Vitamin B12 revitalizes and restores strength during the growth phase , convalescence, weight loss and appetite

Further reading [edit] Wintrobe's Clinical Hematology Thirteenth Edition

There is no single best route, only the one that fits your goals, your schedule, and how your body responds, which is a conversation to have with your provider rather than a decision to make from a webpage