Vitamin-$B_{12}$(Cyanocobalamin) is required for RBCs maturation, DNA synthesis, myelin formation. It acts as coenzyme. Its deficiency causes pernicious anaemia. Best source of vitamin-$B_{12}$are fish, liver, eggs, milk, colon bacteria.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.