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B12 injections deliver hydroxocobalamin (the preferred formulation in the UK) or cyanocobalamin directly into muscle tissue, bypassing the gastrointestinal tract to ensure rapid absorption into the bloodstream
Once you puncture the vial, bacteria can begin to grow meaning sterile water is designed for single-use only
Preparing the injection site and loading the syringe As with intramuscular injections, prepare the injection site and load the syringe before administering a subcutaneous injection
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