Vitamin B12 Injection in Tyler, TX: Enhancing Health and Vitality Smart Choice Medical Clinic 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 risk and prenatal testing My DNA is bad. Two cases of vitamin B12 deficiency in patients with beta thalassemia trait: lessons in diagnosis Bulletin of the National Research Centre Springer Nature Link