On Sunday 25/11/2019 in chemistry department/ college of education, in the presence of the head of department and chemistry staff, the held a seminar titled “Vitamin B12” delivered by Assist. Proff. Lutfia Muhammad. Seminar started with the brief description of the biological function of vitamin B12 and it is related to some diseases, after that, she mentioned the signs and symptoms with the deficiency of the vitamin B12 and how to diagnose it. Finally, the end of the seminar, the discussion was opened.