monthly b12 injection dosage Shots for Adults: How Much, How Often, and Key Guidelines Vitamin B12 Injections: 8 Dosage
Description
Injection is 1-2 times a week

Some people may require regular injections to maintain adequate levels for their entire lives, whilst others may just need an initial boost which can then be maintained through diet

doi: 10.1186/s13045-020-00930-1 64 SunJMuzBAlhallakKMarkovicMGurleySWangZet al

That is the default you will meet at your GP surgery

Diabetes and Metabolic Syndrome Clin

Strict vegans/vegetarians with low intake who prefer a rapid correctionthough high-dose oral B12 is usually effective (AAFP)
