Here at Queen B we love this amazing product which always seems to nip sore throats and oncoming colds in the bud. It hasn't got the nicest taste but its effects far out weigh the initial discomfort caused. It does have a slight burning sensation. Some information about Propolis or bee glue is a resinous mixture that honey bees collect from tree buds, sap flows, or other botanical sources. It is used as a sealant for unwanted open spaces in the hive. It contains a high level of flavonoids( powerful antioxidants with anti-inflammatory and immune system benefits) There is a warning on the bottle that this may cause allergic reactions.