Strong defense complex - Stop external aggressions! SANOGEM helps to slow the development of germs thanks to the combination of poplar and alder bud extracts, the main vegetable sources of propolis. To produce their propolis, bees collect almost exclusively poplar and alder bud resins, which are rich in flavonoids. Among other things, for bees, this propolis has a hygienic role by creating a protective layer against microbial or fungal invasions. While poplar was considered by the ancients to be a shield tree, glutinous alder is a robust species that is resistant to rot.