Vitamin D3, also known as Cholecalciferol, is the more potent form of Vitamin D that is known to increase levels of Vitamin D in the blood more effectively to support your child's heart health and immune system to fight infection and help build strong bones, teeth and muscles. Taking Vitamin D3 in liquid form is beneficial for children who have limited exposure to sunlight and are not fond of eating fatty food from animal sources. Nutravita's Vitamin D3 Drops for kids have been formulated to support babies and children up to 5 years old. One drop directly into the mouth provides the 10μg or 400IU of daily recommended dosage of Vitamin D3 for kids. Our drops come in 60ml bottles with approximately 2000 drops.