Decarboxylation is the process of removing the carboxyl group from the molecules of cannabis' constituents, such as THC and CBD, activating them. Cannabis is heated at a specific temperature for a predetermined period of time. This technique is necessary before producing cannabis-infused products like edibles or tinctures since cannabis plant material that has not been processed yet is not psychoactive. Here you can find How to Decarboxylate Cannabis at weedlifestyles.