Combustion Byproducts

Combustion byproducts refer to aromatic compounds released during heating or smoking of cannabis material, distinct from the original plant terpene profile. These secondary aromas—such as ammonia, char, ash, or acrid notes—result from thermal degradation of cannabinoids, terpenes, and plant matter at high temperatures. Combustion byproducts are not bred into cannabis; rather, they emerge as a function of consumption method and temperature. Understanding this distinction helps breeders and consumers differentiate between genetic terpene expression and artifacts of processing or use.

Breeders focus on primary terpene profiles and stability rather than combustion characteristics, as these byproducts are outside genetic control. However, breeders working with dense, oily phenotypes may indirectly influence smoke character through cannabinoid and terpene concentration—factors that can affect thermal breakdown profiles during heating.