This document summarizes key information about vitamins D, E, and K. It discusses their structures, sources, daily requirements, physiological functions, and deficiency diseases. Vitamin D aids in calcium absorption and bone mineralization. Vitamin E acts as an antioxidant and prevents sterility. Vitamin K is required for blood clotting as it allows the production of clotting factors in the liver. The document provides details on each vitamin to inform about their roles and importance.