Bees make propolis, which they use to glue the materials of their hives together, by mixing beeswax and other secretions with resins from the buds of conifer and poplar trees. Those resins have natural germicidal properties. For centuries, people have used propolis on wounds and as a remedy for ailments ranging from acne to cancer, osteoporosis, itching, and tuberculosis. A number of studies have tested its effectiveness in humans and animals as a treatment for burns, minor wounds, infections, inflammatory diseases, dental pain, and genital herpes. Propolis has proven antibiotic and antiseptic properties and may also have antiviral and anti-inflammatory effects. It is generally recommended as a good topical treatment for uncomplicated wounds, as a remedy for sores and irritations in the mouth and to treat canker sores and sore throats. If you have had an allergic or hypersensitivity reaction to bee stings or bee products (including honey), you could react to propolis in the same way.
1 oz. bottle