does b12 injection need to be refrigerated Semaglutide Storage Guide: Refrigeration Requirements vitamin b12 injection storage temperature

Two weeks Some individuals notice ongoing progress if their deficiency is mild

Methylcobalamin is the more potent form of vitamin B12 and used by your body to maintain a number of organ systems, metabolize cells, and even supportive of brain functions

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

Also, one less metabolic step is needed for the conversion of hydroxocobalamin than cyanocobalamin