Natural Oils - Properties
1) Carrier Oils:
These are also called carrier oils when used in aromatherapy, or when used with essential oils to carry the therapeutic properties of the essential oil on to the skin. Most are vegetable oils, but some are not. Emu oil comes from the emu bird, and there are sometimes marine oils used for natural skin care.
2) Essential Oils:
These oils are processed and distilled from bark, roots, leaves and blossoms of a botanical plant. They have a very concentrated aroma and will evaporate. Essential oils will not go rancid, but can oxidize and lose their benefits. They can cause severe irritation if applied directly to the skin, so they must be diluted with a fixed or base oil, called a carrier oil in this application.