does injectable b12 require a prescription Need Boost? Finding and Buying for Humans Why Your Vitamin B12 Injection

If you've had a BAD experience with B12 shots, it's most likely that you do not tolerate or convert cyanocobalamin well (see if you can verify what form of B12 was in the shot that made you react poorly, and then stay away from that specific form if you can)

Retrieved 2008-06-15

This schedule aligns with British practice, reflecting the longer duration of action of hydroxocobalamin

Symptoms of deficiency can vary from person to person, but may include impaired brain function, tiredness and lack of energy, breathlessness and fatigue, headaches, pale skin, heart palpitations, loss of appetite and weight loss, anxiety and depression

Prompt parenteral administration of Vitamin B12 prevents progression of neurologic damage

It's not a vague "wellness" connection it's a documented biochemical dependency