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.