The video briefly discusses vitamin D and its actions in the body. Types of vitamin D preparations or drugs and their uses are also explained in a hand written graphical manner which seems very grasping. Timeline: 0:00 Vitamin D Introduction 0:25 Supplies of Vit D (Diet, Skin, Stored in liver) 0:40 Pharmacokinetics of Vit D in body 2:24 Action of Vitamin D 3:04 Increased or decreased Vit D 4:20 Types of Vit D preparations 5:50 Uses of Vit D