Injection quantities vary per individual purpose
Indications and Usage for B-12 Compliance Injection Cyanocobalamin is indicated for vitamin B12 deficiencies due to malabsorption which may be associated with the following conditions: Addisonian (pernicious) anemia Gastrointestinal pathology, dysfunction, or surgery, including gluten enteropathy or sprue, small bowel bacteria overgrowth, total or partial gastrectomy Fish tapeworm infestation Malignancy of pancreas or bowel Folic acid deficiency It may be possible to treat the underlying disease by surgical correction of anatomic lesions leading to small bowel bacterial overgrowth, expulsion of fish tapeworm, discontinuation of drugs leading to vitamin malabsorption (see DRUG INTERACTION), use of a gluten-free diet in nontropical sprue, or administration of antibiotics in tropical sprue
Since injections do not have to go through your digestive system, your body absorbs the B12 more quickly
Wiffen P, Derry S, Bell R, et al
(25) Interestingly, the bioavailability of vitamin B12 in dietary supplements has been found to be around 50% higher than from food sources
Revue de Medecine Interne 2005;26:93846