b12 injection dosage for weight loss Vitamin The Timing of B12 Injections:

If you have a temporary deficiency or increased requirement (say, after a surgery or during recovery from an acute illness), you might only need a short course, perhaps a few weeks of injections, until your vitamin levels normalize or you can meet your needs by mouth again

Metabolic and weight support benefits build gradually with consistent weekly use, paired with diet and movement habits guided by your provider

The new guidelines from the British Committee for Standards in Haematology state that you should treat based on symptoms alone

Individuals with certain allergies, liver conditions, or kidney disease, or those who are pregnant or nursing, should consult a physician before starting any injection protocol

(PubMed) Stevens VL, McCullough ML, Sun J, Gapstur SM