So, if your vitamin B12 deficiency is due to an autoimmune disease in which your stomach doesn't make intrinsic factor, supplements might not work for you, and you will need injections
For instance, glucagonlike peptide 1 [GLP-1] receptor agonist drugs, such as Ozempic and Wegovy, are peptides, as are [the hormones] insulin, vasopressin, oxytocin, and human growth hormone
Being deficient in vitamin B12 has been linked to anxiety due to the way B12 deficiencies trigger symptoms in red blood cells and the nervous system, and interfere with brain chemistry
On the other hand, if convenience and cost are top priorities, oral supplements are a viable option for maintaining good health
(2008) Cyanocobalamin may be beneficial in the treatment of recurrent aphthous ulcers even when vitamin B12 levels are normal