Silica containing mainly silicon oxide (94%), but also aluminum, iron, calcium, magnesium and phosphorus. Aluminum oxide and silicon oxide are ultra-trace elements, whose function until now is still unknown. Through the food all living things seem to meet their needs for silicon because no deficiency symptoms occur. In recent years, more and more silica manufactured items to ensure that the hair, nails and skin of the patient improve. The fact that these products are having the desired effect has not been proven so far.