Propolis is a natural substance produced by bees: the workers collect the resin from the buds of some plants, in particular poplars, birches, elms, oaks, they digest it partially thanks to enzymes contained in the salivary secretions and by combining it with pollen and wax, they give rise to a substance with an aromatic scent and extraordinary properties. It is mainly composed of resin, pollen, essential oils, minerals and organic compounds such as phenolic acids, flavonoids. Bees use it as a building material, to seal the cracks in the hive, but above all as a sterilant, to protect the hive from attack by harmful microorganisms. An indispensable substance for bees, it also becomes a great ally of man. In fact, the organic substances present in propolis give it antibacterial, antifungal, antiviral, anti-inflammatory, antioxidant and healing properties.It also acts as an immunostimulant by regulating the functions of the immune system.Its precious properties derive from its chemical composition which in turn is the sum of some factors: vegetable substances from which it derives, harvest season, species of bees and the procedure adopted for extraction; this means that its biological action also depends on its origin.