– 50 µg = 2,000 IU = 1000% of the RDA of Vitamin D3 (Cholecalciferol) from Lanolin. – Sunflower oil and alpha-tocopherol (antioxidant). Contents of the containers: 750 drops. - 1 µg of CHOLECALCIFEROL is equal to 40 IU of Vitamin D3. Oily forms provide better bioavailability than ethanol-based or tablet forms. Dosage: ONE drop per day or as prescribed by a doctor. – Our products Vitamin ORTHO D3 – 1,000 IU and 2,000 IU are a Food Supplement and do not replace a varied diet. – Store in its original packaging, in a dry environment and at room temperature. – Keep out of reach of children. – No preservatives, colorings, artificial flavors, gluten, or lactose. – It is recommended to adhere as closely as possible to the CDR indicated by the manufacturer.