Liquid calcium with magnesium provides these two essential minerals combined with vitamin d and zinc in a balanced, very absorbable, great tasting formula. These are the primary nutrients required for supporting your child's healthy bone growth and development. As your child grows and develops, calcium is the most abundant mineral found in their body, (comprising 1. 5 - 2% of total body weight), with 99% of the total calcium being found in the bones and teeth. For optimum absorption and utilization, calcium should be combined with magnesium, vit d and zinc. These nutrients help support and establish the very foundation, for your child's structural growth and integrity.