This study tested a natural dietary supplement made from wormwood and oak bark on honey bees infected with Nosema ceranae, a parasite that weakens bee colonies. The supplement significantly improved bee survival and reduced parasite levels, regardless of when it was given. It also reduced harmful oxidative stress caused by the infection. While it didn’t boost immune genes as strongly as some other treatments, its plant-based nature and consistent effectiveness make it a promising tool for beekeepers.