Sources of calcium
Milk, cheese, yoghurt, tinned fish, green veg and fortified products like cereal
What are the functions of calcium
It builds strong healthy bones and teeth in children and teenagers, it maintains old bone density (hardness in adults and older people).
What are the two types of diseases you can get from not eating enough calcium
Rickets (problems with bone formations) and osteoporosis (causes bones to become weak).