Adult Ddrops® 180 drops provide an easy way to get 1000 IU of pure vitamin D3 in just one drop. Daily intake provides the necessary support for immune function and the maintenance of bones and teeth.     Dosage: For adults: Take 1 drop daily, or as directed by a healthcare practitioner. The drop may be licked off a clean surface, such as the back of a washed hand, or directly onto food or a drink.