Essential Oil Manufacturers are our nature’s best kept secret and are also referred to as ‘essences’. These oils are botanical extracts of a variety of plant materials, including flowers, spices, roots, and leaves, among others. Each has its own unique combination of active ingredients, which defines the oil’s intended use. Although some oils are used for physical healing, such as treating swelling or fungal infections, others are used for emotional reasons, such as enhancing relaxation or making a room smell nice.