1. Biosynthesis, molecular mechanism and disorders of calcitriol. 2. Iodide metabolism in thyroid follicles 3. Absorption of iron 4. Biochemical functions of various types of vitamin A and provitamin A 5. Mechanism of carboxylation by biotin 6. Non-heme transport of iron in enterocytes 7. Transferrin cycle 8. Regulation of synthesis of Ferritin and Transferrin-receptor 9. Role of hepcidin in iron metabolism 10. Changes in various laboratory tests in iron deficiency anemia