Tetrahydrocannabinol ( THC ) , often considered to be the primary active substance in cannabis , along with other psychoactive cannabinoids are hydrophobic oils , which are insoluble in water but soluble in lipids ( oil / fat ) and alcohol .
Tetrahydrocannabinol ( THC ) is often considered to be the primary active substance in cannabis . 
 Along with other psychoactive cannabinoids , THC is a hydrophobic oil , which are insoluble in water but soluble in lipids ( oil / fat ) and alcohol .