Karin Herzog Mild Scrub uses natural marble grains instead of synthetic grains to remove dead skin cells. Natural marble is unique because it produces perfectly round granules which can be used on all skin types, even on very sensitive skin. Use 1 to 4 times per week, depending on oilyness of the skin. From the Karin Herzog Vita-A-Kombi Oxygen skin care line. Determine which of the Karin Herzog Vita-A-Kombi facial products suits your skin the best by clicking INDEX at left and choosing "Vita-A-Kombi Facial Oxygen Products".