The sunshine vitamin for the whole family. Natural vitamin D3 in an organic, cold-pressed virgin olive oil for optimal bioavailability. Essential for immunity and the maintenance of normal bone structure. D-NAT 1000 provides 1,000 IU* (25 µg) of natural vitamin D3 per drop, in a natural and bioavailable form. Vitamin D is essential for the proper functioning of immune system cells. Essential for bone health, necessary for bone growth, mineralization, and development, it influences the absorption of calcium and phosphorus. Vitamin D is involved in muscle function and also plays an important role in cell division. Thanks to its formula, which contains natural vitamin D in oily form for better absorption, this natural solution is suitable for most people, providing 1,000 IU* per drop. Directions for use: 1 drop daily on a food support or directly on the tongue, for a minimum of 1 month. Repeat if necessary.