Propolis is a valuable natural ingredient that stimulates the bodys natural defenses to combat the symptoms of the common cold. Propolis is the material produced by bees to disinfect and seal the interior of the hive, reduce entry and prevent invasion by intruders. It consists of resinous substances and pollen, enriched with wax, enzymes and essential oils. Its beneficial effects on the human body have been known for centuries, making it one of the most important beekeeping products. The usual use of propolis solution in alcohol is 20 to 30 drops of propolis for adults and 10 for children, dissolved in a glass half full of water or milk.