Cyanocobalamin (B12) Products American Regent Best Vitamin B12 Injection Sites: Where to Inject B12 PA Relief Thalassemia: High Yield Notes Inherited microcytic anemia ( globin chain production) severity varies from trait (mild) to major (severe) Key Concept Microcytosis from reduced hemoglobin synthesis Trait often mild asymptomatic; Thalassemia Concise Medical Knowledge Best Vitamin B12 Injection Site: Administering B12 Shots Deferoxamine injection is used to remove excess iron from the body in anemia or thalassemia patients who have many blood transfusions. It is also used with other medicines to treat acute iron