In these cases, B12 injections can bypass the digestive system and deliver the vitamin directly into the bloodstream
Total gastrectomy always produces vitamin B12 deficiency
It is important to choose a qualified healthcare professional trained in administering vitamin B12 shots
Hong S, Moreno-Navarrete JM, Wei X, Kikukawa Y, Tzameli I, Prasad D, Lee Y, Asara JM, Fernandez-Real JM, Maratos-Flier E, Pissios P. Nicotinamide N-methyltransferase regulates hepatic nutrient metabolism through Sirt1 protein stabilization. Nat Med. 2015 Aug;21(8):887-94. doi: 10.1038/nm.3882. Epub 2015 Jul 13. PMID: 26168293; PMCID: PMC4529375
Here are the best vitamin B12 injection sites for each method: Subcutaneous B12 injection sites Usually, the best places to give yourself a B12 shot subcutaneously are the abdomen, thigh, and upper arm, as you can see in this illustration: Although not shown above, the buttock is another good site for B12 shots