I receive monthly intramuscular vitamin B12 (cobalamin) injections, but my serum B12 level measured two weeks after the injection is only 268 pg mL; why is it low and how should the dosing VITAMIN B12 (Generic) Injectable Solution, 1000 mcg mL, 100 mL vial Easy Refills Chewy Rx Cyanocobalamin (B12) 1000mcg mL Injection 30mL MDV McGuff Vitamin B12 Injection at BiosenseClinic.com a Licensed Pharmacy VITAMIN B12 INJECTION 1000 mcg mL
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