THC

THC is the primary psychoactive compound in cannabis.
When THC is ingested, it binds to CB1 receptors in the brain and central nervous system, leading to the release of dopamine, a neurotransmitter that regulates pleasure and reward. This release of dopamine is what produces the characteristic "high" effects including euphoria, relaxation, and altered perception.

When cannabis is heated or exposed to light, THCA is converted into THC through a process called decarboxylation.

In addition to its psychoactive effects, THC has also been found to have potential medicinal properties. It may be effective in treating chronic pain, nausea, and muscle spasms, and may also have anti-inflammatory and antioxidant effects.