b12 injection location on body vitamin Store How to inject B12 in your arm Best Vitamin B12 Injection Site:

Selectivity of NNMT inhibitors Test compounds were screened in biochemical assays for activity against three structurally similar methyltransferases, including catechol-O-methyltransferase (COMT), DNA (cytosine-5)-methyltransferase 1 (DNMT1), and protein arginine methyltransferase 3 (PRMT3)

Also, sadly enough, there also are many types of (chronic) diseases that require B12 injections, such as Pernicious Anemia, people with Crohns, celiac, and people with intestinal imbalances, such as intestinal tapeworms and excessive bacterial growth

10.1002/jmd2.12055

This can cause those medications to be ineffective

Hydroxocobalamin 1 mg/mL Solution for Injection Summary of Product Characteristics

Soria-Valles C, Osorio F, Gutirrez-Fernndez A, De Los Angeles A, Bueno C, Menndez P, Martn-Subero JI, Daley GQ, Freije JM, Lpez-Otn C