The resin and gum symbolize the life force that oozes out from a tree’s bark or stems. This article discusses those resins and gums, answering the question: What is the difference between resins and gums? Further, the following terms are reviewed in detail: Gum resin, sap, and resinoids. The amazing aromas that can be found in resins and gum resins are a true delight. However, there are several species that produce aromatic resins that have become threatened. As a professional aromatherapist and an “impactful consumer,” it is important to be aware of unsustainable essential oil species.