Tetrahydrocannabinol (THC) is the most well-known psychoactive cannabinoid in cannabis. It interacts directly with CB1 receptors in the brain, producing a ‘high’ sensation. THC has powerful medicinal effects including pain relief, anti-inflammatory action, neuroprotection, and appetite stimulation. It’s found in strains like Girl Scout Cookies and Ghost Train Haze. Boiling point: 314.6°F (157°C).