This is a natural substance called Propolis which is collected by Honey Bees from things like buds & trees. Propolis has many health benefits & contains essential oils, waxes, bioflavonoids & tree resin. The bioflavonoids in the substance are the most important components in Propolis. The antioxidant effects of bioflavonoids may help to maintain a healthy immune system. Bee Health guarantee the bioflavoboids present are naturally occurring flavonoids, with no synthetic substances added.