Propolis is a compound that bees use to seal and stabilize their hives. It also protects the hives from bacterial and fungal infections. Bees also use Propolis to mummify carcasses of small mammals and reptiles when they are too large to carry out of the hive. The bodies of these animals are preserved, preventing rotting and disease. Pretty incredible, right? It’s all thanks to the antibiotic nature of Propolis. Bees manufacture this compound by collecting resins on trees and flowers, as opposed to collecting pollen for honey production.