– 50 µg = 2,000 IU = 1000% of the RDA of Vitamin D3 (Cholecalciferol) from Lanolin. – Sunflower oil and alpha-tocopherol (antioxidant). Container content: 750 drops. - 1 µg of COLECALCIFEROL is equal to 40 IU of Vitamin D3. Oily forms give better bioavailability than ethanol-based or tablet forms. Dosage: ONE drop per day or according to medical prescription. – Our Vitamin ORTHO D3 products – 1,000 IU and 2,000 IU are a Food Supplement and do not replace a varied diet. – Store in its original container, in a dry environment and at room temperature. – Keep it out of the reach of children. – Without preservative agents, colorings, artificial flavors, gluten or lactose. – It is recommended to adhere as closely as possible to the CDR indicated by the manufacturer.