High potency propolis liquid Rich in bioflavonoids Can be drank, gargled, or applied to the skin Bee Health Propolis Liquid contains 50% high potency propolis, and can be drank, gargled, or applied to the skin. Propolis is a natural substance collected by honey bees from buds and trees. It naturally contains tree resin, essential oils, waxes and bioflavonoids. Bioflavonoids are one of the most important components in propolis.