What is an Oil ?
When we speak in Aromatherapy and skincare of an “Oil” we mean a “lipid” or “fat”.

Also known commonly as Vegetable, Nut or Seed Oil, or carrier oil or base oil – these oils are by nature “oily” or “fatty” and they form a slippy layer on the skin for massage as well as providing nutrition and moisture to the skin in skincare. They are perfect for blending essential oils so that they may be used on the skin and they are part of the emulsification process in skincare that leads to the formation of a cream.
All oils of this description are chains of fatty acids. Fatty acids can be saturated or unsaturated. They are the major component of fat in the human body and are important for energy as well as repair and maintenance of healthy cells. Of the essential fatty acids Omega 3 and 6 are the most important in nutrition and cell maintenance and repair as they are not produced by the body itself and so must be acquired through diet and/or skincare depending on the requirement.
All oils will have a different consistency and function on the skin. Some such as Jojoba ( which actually comes from a bean similar to a coffee bean) are very similar to the skin’s own composition and so are widely used in skincare. Others such as Avocado are very thick and viscous and green in colour and so is used more specifically where really dry skin needs the extra nourishment. There are even oils such as sesame which give a sun protective quality to the skin by naturally filtering out UV rays whilst moisturising. Evening primrose is often taken internally to assist with skin conditions such as dermatitis and eczema and can also be used in skincare for this purpose.
In Organic skincare it is the Cold-pressed (or mechanically- pressed ) oils that are used as they retain the most nutritional value. Once an oil has been refined or hydrogenated and heated or chemically treated much of the true value of the oil has been lost.
Below is a List of some Oils used in Aromatherapy :
Almond Avocado Apricot Kernel
Jojoba Sesame Rosehip
Evening Primrose Avocado Olive
Camellia Macadamia Neem
Hazelnut Safflower Sunflower
Wheatgerm Canola Soybean
What is an Essential Oil?
An essential oil is not really an “oil” in the sense that we have been discussing above at all.

An essential oil is “the fragrant principle of the plant” ( Lavabre). An essential oil is a chemical component occurring naturally in the plant/flower/root/bark and it is contained within special secretory oil glands and must be extracted through steam distillation, mechanical processing or solvent or CO2 extraction. The more oil glands present in the plant the higher the essential oil yield of the plant which explains to a certain degree why some plants such as the Rose have a much higher market value than for example Lemon or Lavender.
The secretory cells of a plant have tapped the photo-electro-magnetic energy of the sun together with enzymes create highly diversified aromatic molecules which are the essential oils.
For the purposes of the plant itself essential oils are used to attract pollinating insects or deter bugs and insects that may attack the plant.
The main difference between oils and essential oils are that oils are lipids “fats” and essential oils are not. Essential oils are hydrophobic and lipophilic which means they are water-hating and fat-loving molecules. Essential oils will never dissolve in water alone but they can be blended with oils or fats of any kind to be solubilised.
Essential oils are organic compounds made up of hydrogen and carbon. Much more work is available today on essential oil chemistry than 20 years ago however we still have much to learn about some of the constituents and their processes and functions. Essential oils are a wonder of nature and we need to treat them with respect as their power is greater than we yet know. This being said essential oils can be used very safely to enhance the quality of life, improve functioning of the body and mind and also to treat ailments and symptoms.
Some of the properties of essential oils are :-
Anti-microbial, Anti-bacterial, Anti-viral, Antiseptic, Anti-spasmodic,Analgesic purifying, Anti-inflammatory, Sedating, Uplifting, Cephalic, Anti-fungal and much much more.
Essential Oils work on the body in three different ways:-
1) Through inhalation – There is powerful evidence that the essential oils work through affecting the limbic system which is the controller of the body’s emotional and mental response to smell as well as actually changing the physiology of the body for e.g. Studies have shown reduction in stress and blood pressure from inhalation of Lavender. The body will retain up to 5% of the oils inhaled.
2) Via topical application – this when essential oils are applied topically to the skin usually diluted at various levels in a carrier or base which can be oil, cream, lotion, gel, bath oil etc. The dilution will vary depending on the purpose for e.g in skincare dilutions will be low because very little essential oil is required to stimulate a response in the skin. Alternatively higher dilutions maybe used for treating ailments and symptoms for e.g sore throat and fever. In france a common practice is ‘aromatic perfusions’ which involves the blending of pure essential oils for a specific purpose which are then applied undiluted directly to the skin which is usually warmed first – this is only ever recommended under the guidance of a qualified practitioner and is to treat acute symptoms. Dependent on the dose and the method of application and whether the skin is covered or not the body will use between 20-70% of the oil applied to the skin.
3) Oral ingestion – Many essential oils are used in the food industry and more commonly in Europe medical practitioners are trained in the ingestion of essential oils to treat physical diseases. Again there is no formal training currently in Australia covering oral ingestion. Oral ingestion is not recommended except under the guidance of a qualified practitioner. Depending on the method the body may use up to 90% of the oil ingested.
Essential Oils are volatile substances, which means when they come into contact with air they will evaporate, this is why we can smell them. They are tiny molecules that travel through the skin and into the blood stream whenever they are applied topically which is why they are so efficient for repair and maintenance effects. They are metabolised (like food) and are excreted by the body through the lungs, the kidneys and the liver.
Essential Oils are extremely useful in skincare and aromatherapy and so little is needed for a great effect. The body knows how to use them and therefore used correctly they are not toxic. As with any food or plant substance there are cases when an essential oil from a plant should not be used at all or cases when a certain person may present with an allergy and this should not be taken lightly. However on the whole essential oils can be used widely and safely by everyone.