How Often to Have a B12 Injection How often to have B12 injection depends entirely on your individual needs
The Optimal Vitamin B12 Dosage for Kids, Pregnancy, and Seniors At age 50, everyone, regardless of diet should start supplementing with B12-fortified foods or supplements but over age 65 only high-dose daily supplements may suffice
The clinical pictures of vitamin B12 allergy caused by type 1 hypersensitivity that have been revealed with basophile histamine release test and skin prick tests as we have performed in our patient.10 We did not perform basophile histamine release test or specific IgE determination to indicate type 1 hypersensitivity reaction because of positive SPT results of both types of cobalamin preparation
23 Supplementation of 1 mg daily is recommended for patients with specific risk factors (e.g., bariatric/gastric surgery patients, those with severe malnutrition, chronic alcohol use, chronic hemolytic anemia and conditions with high cell turnover, and use of antimetabolite medications such as methotrexate)