Hexahydrocannabinol (HHC) is a psychoactive cannabinoid that can be found in trace amounts in cannabis plants. It can also be produced synthetically by hydrogenating cannabis extracts. HHC was first created in 1944 by adding hydrogen molecules to Delta-9 THC. HHC is a hydrogenated derivative of tetrahydrocannabinol (THC). THC is the ingredient in marijuana that makes you feel high. HHC is slightly stronger than delta 8 THC but not as powerful as delta 9 THC. HHC may have adverse effects, such as: Dizziness, Drowsiness, Increased heart rate, Anxiety, and Confusion. High doses of HHC can lead to adverse effects, including severe disturbances of the mind and body. There's no research on how long the effects of HHC last. However, people report that the effects last longer than that of regular THC or cannabis.