Propolis, also known as bee glue, is a resinous substance collected by honeybees from tree buds, sap flows, or other plant sources. Bees use propolis to seal small cracks and holes in their hives. Propolis has a deep brown color and a consistency ranging from soft and malleable to very hard and brittle depending on its resin and wax content. The chemical composition of propolis is complex and varies based on plant sources in different ... Read more
