Some compounded methylcobalamin products may specify storage at room temperature, refrigerated, or frozen prior to mixing
The same is true if your blood work only shows signs of mild abnormalities: high levels of reticulocytes (immature red blood cells), homocysteine (an amino acid broken down by vitamin B12), or methylmalonic acid (MMA, a byproduct of amino acid breakdown) should subside after just a few vitamin B12 injection treatments
Dont fall for the hype
How long the vial lasts in terms of doses, and how long it lasts in terms of stability
In this analysis, serum vitamin B12 levels increased significantly in patients receiving oral vitamin B12 and both groups of patients (receiving oral and IM treatment) showed an improvement in neurological symptoms
Takumi Y, Ramirez-Leon V, Laake P, Rinvik E, Ottersen OP (1999)