Hubner Original Silicea is a one-a-day formula that contains the optimum level of silicon (Si) and the trace elements zinc, manganese, selenium and biotin required by the body. After the age of 20, the body loses its ability to store silicon (si). The human body cannot produce silicon (si) itself. The selected ingredients of Hubner Original Silicea 30 Capsules strengthen hair, nails, skin and bones.