what if i hit a vein injecting b12 Accidental IV Injection of Semaglutide: Safety & Recovery How to self-inject intramuscular vitamin
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Lowering the risk for cognitive issues tied to deficiency, such as difficulty focusing, poor memory and an increased risk for attention disorders

It's essential to consult a healthcare professional to determine the appropriate frequency of B12 injections
doi: 10.1001/jama.2012.113905
I've also read that it is a form of detox

Key takeaways Vitamin B12 deficiency can cause headaches and may be linked to chronic migraine
It is not uncommon for strict vegans to suffer from a B12 deficiency