Bayer Elevit pronatal 100 tabletsVitamins, minerals and trace elements are essential building materials and are therefore also referred to as vital substances. They cannot be produced by the organism itself, but must be supplied with food. Vital substances, especially vitamins and trace elements, are essential for all life processes (such as respiration, digestion, energy production, brain and nervous system function, growth and reproduction). On the other hand, many vital substances