Propolis

In Nature, Propoli, is produced by bees' work. In particular, it is for the bees that are entrusted with the task of collecting, mainly from the plant buds, the resinous and waxy materials that will then be transformed by the bees of the workers. Used to cover the hive walls, to fill cracks and holes, to polish the cells before the queen bee puts eggs, Propoli is known since ancient times even to man who discovered the large ones virtue. Rich in flavonoids and balsamic aromatic essences, useful for both indoor use and to soothe small skin problems, Pliny also spoke to him extensively in his "Naturalis historia".
This precious resin was used in the making of musical instruments, such as the famous violin tracks. Propoli is also widely regarded as an effective ally of the organism today.