... the buds of some trees and oozes from the bark of other trees, chiefly conifers. The ... bees gather propolis, sometimes called bee glue, and carry ... acid, tetochrysin, isalpinin, pinocembrin, chrysin, galangin, and ferulic acid.The Properties of Propolis Propolis is another ... take propolis regularly escape winter colds and sore throats and seem to develop a natural ...