The better option depends on your treatment goal, comfort level, safety needs, and provider recommendation
I can definitely tell a difference in my energy and focus I feel amazing
The NHS hypokalaemia overview explains why it matters, and clinical references such as StatPearls on B12 deficiency treatment specifically flag monitoring potassium during the early loading phase in people who were severely deficient
Most research-community protocols cap on-time at 4-6 weeks with at least equal time off between cycles
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Also, restrictive diets, such as vegan diets, can complicate dietary vitamin intake