Some NHS/ICB guidance notes oral options for dietary-related deficiency, and that long-term injection schedules depend on the cause
While definitive conclusions are premature, the assumption that unlimited B12 is harmless deserves ongoing scrutiny
In one of his dear doctor letters, he writes that there is no proof that intramuscular B12 injections are better than oral tablets, so stop treating people with B12 injections
"The effects of human growth hormone and its lipolytic fragment (AOD9604) on lipid metabolism following chronic treatment in obese mice and beta(3)-AR knock-out mice." Endocrinology Publication confirming the effectiveness in body weight reduction and the mechanism of action
Vegetarians and vegans seeking to prevent deficiency rather than correct existing insufficiency may maintain levels with consistent oral supplementation
It depends on your symptoms, lifestyle, and how your body responds to treatment