Comvita Propolis Tinctures are made from the highest quality Propolis in an alcohol base delivering a powerful antioxidant that supports the immune system. Propolis is a wonderful natural protective system designed to support well-being, with well-known antioxidant properties to help maintain a healthy immune system. Bee Propolis is created by honeybees to protect their own hives and contains high levels of active bioflavonoids that have well-known antioxidant properties to help support your immune system. Our extra strength Propolis Tincture PFL 30 delivers 30mg of active Propolis flavonoids per recommended dose. Comvita’s PFL standard measures the potency of flavonoids and the quality of the product from hive to shelf. It ensures that you receive a guaranteed level of flavonoids and other phenolics in each dose of Propolis.