Sisu Kids Vitamin D3 - 1000 IU - Supports the absorption of enough calcium to build strong bones and muscles. Adequate Vitamin D in children’s diets may also protect against a range of diseases, including multiple sclerosis and type 1 diabetes. Vitamin D is essential for a range of bodily functions. In particular, it activates the absorption of calcium, which is crucial for building bones and muscles. This is especially important in the growing years, as peak bone mass is usually achieved by the age of 25. If optimal bone mass is not achieved in these crucial years, osteoporosis and other bone diseases are more likely later in life. Vitamin D is also necessary to enable absorption of Vitamin C, and is required for good nervous system function and blood clotting. Chewable strawberry-banana flavoured tablets.