The most abundant cannabis terpene. Increases cell membrane permeability, allowing THC to cross the blood-brain barrier faster. High myrcene = heavier, more sedating effect regardless of strain type. The primary predictor of couch-lock.

The only terpene known to directly activate CB2 receptors, producing anti-inflammatory effects without psychoactivity. Reduces stress and may help lower cortisol. Found in black pepper and cloves.

Mood elevation and stress relief. Interacts with serotonin receptors, reducing anxiety and brightening mood. The terpene behind citrus-forward strains that feel uplifting rather than heavy.