Help in the development and maintenance of bones and teeth in children with Sisu Vitamin D3 1000IU. Kids' Vitamin D3 from Sisu is ideal for daily health and also help prevent various chronic health conditions and is essential to calcium absorption and helps support bone density and reduce fractures. One Kids Vitamin D3 chewable tablet from Sisu provides 1000 IU of vitamin D, which is the amount recommended by most paediatricians for all infants and older children.