Propolis, also known as bee glue, is a sticky wax-like substance that constitutes a mixture of bee salivary secretions, bee wax, and resinous sap occurring in the bark and leaf-buds of specific plants [37,65]. It comes in green, red, brown, or black colors based on the collected local flora [66]. The word propolis comprises two Greek words “pro” and “polis”, which in order mean “in front of or at the entrance to” and “community or city”. Propolis is a hive-defensive substance, which bees use to protect and repair their hives [67].