Terpenes are a class of natural products consisting of compounds with the formula (C5H8)n for n ≥ 2. They are unsaturated hydrocarbons produced predominantly by plants, particularly conifers, and comprise more than 30,000 compounds. Terpenes are major biosynthetic building blocks and are also the primary constituents of the essential oils of many types of plants and flowers. They are responsible for the aromas, flavors, and even colors associated with various types of vegetation. Terpenes are highly aromatic compounds that determine the smell of many plants and herbs, such as rosemary and lavender, as well as some animals. They are also found in many fruits and vegetables. Terpenes are thought to protect plants from harsh weather and predators. In terms of cannabis, terpenes are what make certain strains smell or taste different from others. Terpenes are highly non-polar, colorless, and insoluble in water. They are tactilely light oils considerably less viscous than familiar vegetable oils like corn oil, with viscosity ranging from 1 cP. Terpenes are bioactive, which means they may affect the body. This effect will vary based on the concentration of the terpene itself and how a person uses it. Many terpenes have demonstrated beneficial effects on the body and could serve as alternative medicine or therapies.