This unique combination unites food quality oil of oregano with extra virgin olive oil to create a pre-diluted blend that is phenolic constituents including carvacrol, the active component in the Origanum species. NOW® Oil of Oregano is 100% natural and steam distilled from the flowering tops of Origanum vulgare. Suggested Use: This blend is already pre-diluted and ready for aromatherapy use. Please consult an essential oil book or other professional reference source for suggested uses.