PROPOLINE natural products are formulated by learning from the self-sustained community of the bees and the natural materials they produce. The key ingredient in Propoline products is propolis, a valuable and unique substance produced by bees in order to build a protective, sterile wall around the hive. Propoline products also contain honey and beeswax, and incorporate a variety of natural extracts derived from the Greek flora such as rosemary, soapwort, marigold and St. John's wort.