Carrier Oils used in Treatments They are t he base oils are used for all the massage and reflexology treatments. According to Wikepedia Carrier Oil definition Carrier oil , also known as base oil or vegetable oil , is used to dilute essential oils and absolutes before they are applied to the skin in massage and aromatherapy . They are so named because they carry the essential oil onto the skin. Carrier oils do not contain a concentrated aroma, unlike essential oils, though some, such as olive, haven a mild distinctive smell. Neither do they evaporate like essential oils, which are more volatile .The carrier oils used should be as natural and unadulterated as possible. Organic oils should be used where possible. Cold-pressing and maceration are the two main methods of producing carrier oils. Mineral oil should not be used as it is not absorbed by the skin. There is a range of different carrier oils, each with a various therapeutic properties. Choosing the oil will depend on the a...