Thalassemia Concise Medical Knowledge Best Vitamin B12 Injection Site: Administering B12 Shots Are Vitamin B12 Shots Right for You? Vitamin B12 Injection Manufacturer AdvaCare Pharma 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;