I believe that this new practice by suppliers to the essential oil business gives new thought to the benefits of substitutions in the role of essential plant and fragrance vibration. The practice of substitution seems to be more applicable in the area of fragrancing rather than the use of plant substances as treatments to the skin and body. Natural fragrances also differ from perfume oils or simply fragrance oils in that perfumes and general fragrances have a higher level of synthetics in their chemistry. The Natural fragrance oil is a nice cost effective alternative to the high cost of using essential oils for a daily body fragrance. These oils are also quite concentrated in form and may be sold by the ounce, the half ounce and the quarter ounce.
Many people like to add additional propylene glycol or glycerin to extend the amount of fragrance.
It is similar to the dilution involved in going from a perfume to a cologne but the dilution material is not alcohol. Propylene Glycol is a thin emollient substance that is tasteless odorless colorless and nontoxic. Glycerin is a heavier slow moving thick substance that is slightly sweet to the taste. It is extremely emollient and nontoxic. For use as only a fragrance, both carriers are considered superior to using a natural base carrier such as a vegetable oil because they stabilize the essential fragrances and increase the shelf life.