b12 injections nhs choices How to self-inject intramuscular vitamin - Overview B12 and Folate Testing –
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The outer thigh and back of the upper arm are also appropriate

However, neurological symptoms like numbness, tingling, or balance issues may take longer because nerve healing is a slower process

They are referred to as vitamers having vitamin activity as a coenzyme, meaning that its presence is required for some enzyme-catalyzed reactions

After initiation and dose increases, patients should be observed carefully for signs and symptoms of pancreatitis (including persistent severe abdominal pain, sometimes radiating to the back and which may or may not be accompanied by vomiting)
