why get b12 injection Services B12 Injections - East Valley
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After 3 starter doses you may start to feel better, though some people may see benefits earlier

If any of these symptoms occur, seek urgent assessment via 999 or your nearest emergency department

PMID 18709880

That preservative is the entire reason BAC water exists it inhibits the growth of bacteria, which means a single vial can be punctured multiple times over weeks without becoming a contamination risk
