Propolis is a natural substance collected by honey bees from buds and trees. Propolis contains tree resin, essential oils, waxes and bioflavonoidsBioflavonoids are one of the most important components in Propolis. The antioxidant effects of bioflavonoids may help to maintain a healthy immune system. This unique natural substance is subject to tests for potency and quality. Bee Health guarantee the bioflavonoids present are naturally occurring flavonoids, with no synthetic substances added.