Bees gather resin from the buds trees and transform it in the bee hive into propolis. They use it as a sealing cement to protect their hive against draught. Propolis is used as a natural medicine. It is the most powerful natural antibiotic.Propolis, as a natural product, has a composition which varies considerably depending on its origin. That is why there are no definite quality criteria.
Propolis is a drug. Drugs are specified in the Swiss Drug Directive. However propolis is not described in the Swiss pharmacopoe, as there are no specific quality criteria.