b12 injection methylcobalamin or cyanocobalamin Compounded (Vitamin B12) Injection, 5mg/mL Cyanocobalamin Vitamin B12 Injection 1000

Consult your physician or a registered dietitian for personalized recommendations

Some compounded methylcobalamin products may specify storage at room temperature, refrigerated, or frozen prior to mixing

[R2, R5] Research Mechanism -2026 Laboratory Applications All applications below are for non-clinical laboratory research reference only

Barcia JP, Strife CF, Langman CB

In people without pernicious anemia, about 0.5 g/day of B12 is reabsorbed by enterohepatic circulation in which B12-containing bile is secreted by the liver into the digestive tract where the B12 is then reabsorbed via intrinsic factor

In-office: Clinics charge for both the vitamin and the administration fee, which can range from $25 to $75 per visit