// Definition
The heat-driven chemical process that converts acid-form cannabinoids into their active forms. THCA becomes THC, CBDA becomes CBD. This is why raw cannabis must be heated — through smoking, vaporising, or cooking — to produce psychoactive and many therapeutic effects. Without decarboxylation, cannabinoids remain in their acid state.
// From the Episode
Decarboxylation was discussed in Episode 4 in the context of understanding why different consumption methods produce different effects. The panel explained that raw cannabis contains THCA and CBDA — acid forms that don't bind to CB1 receptors the same way their decarboxylated counterparts do. Heat removes a carboxyl group from these molecules, transforming them into THC and CBD respectively. This is why smoking and vaporising produce immediate psychoactive effects, while eating raw cannabis does not. The discussion also touched on how controlled decarboxylation at specific temperatures can preserve certain terpenes while still activating cannabinoids — a key consideration for edible and tincture production.
// Source
Ep. 004 Hash Church Episode IV →