===Rickets=== Rickets is a disorder which most commonly relates directly to Vitamin D deficiency, which causes a lack of calcium being absorbed. It can also arise, however, from other causes such as certain types of rare tumors or any phosphate-wasting disease. Because calcium is an essential nutrient which aids bone rigidity, the lack of it being absorbed into the body causes fragile or malformed bones, which are unable to support the weight of a growing body. Rickets causes bone pain, slowed growth in children, dental problems, muscle loss and increased risk of fractures (easily broken bones).
