Propolis is a natural substance collected by honey bees from buds & trees. Propolis contains tree resin, essential oils, waxes & bioflavonoids. Bioflavonoids 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 & quality. Our Bee Health Propolis guarantees the bioflavonoids present are naturally occurring flavonoids, with no synthetic substances added. All Bee Health products are produced to make them the world’s best selling Propolis br&.