Marnys Propolsaft is a syrup derived from propolis with honey, thyme, menthol and acerola cherry. Propolis is a resin made by bees to protect their hive from disease by sealing the walls and cells. One of the food items with the highest source of flavonoids, like galangin, its most effective active ingredient. Marnys guarantees 10% minimum galangin content. Thyme, menthol and honey have balsamic properties. Acerola cherry is one of the fruits with most vitamin C.