Propolis is a natural substance collected by honey bees from buds and trees. Propolis naturally contains tree resin, essential oils, waxes and bioflavonoids. Bioflavanoids are one of the most important components in Propolis. This unique natural substance is subject to tests for potency and quality. Bee Health guarantee the bioflavanoids present are naturally occurring flavanoids, with no synthetic substances added. Propolis is a natural substance collected by honey bees from buds and trees. Propolis naturally contains tree resin, essential oils, waxes and bioflavonoids. Bioflavanoids are one of the most important components in Propolis. This unique natural substance is subject to tests for potency and quality. Bee Health guarantee the bioflavanoids present are naturally occurring flavanoids, with no synthetic substances added.