Carrier oils refer to the solution or the medium which literally becomes the vehicle in which the essential, or neat oil, travels. Many times the carrier oil serves to slow the action of the volatile oil. These oils are fixed oils which means that they are not volatile. Unlike an essential, or neat oil, carrier oils will feel slightly thicker and possibly somewhat greasier. The benefits of your essential oils can be greatly undermined if you do not pay enough attention to the carrier oils that you select. There are several things to consider when choosing which carrier oil you prefer, such as how does it feel when gently rubbed into tender skin areas? What is the nutritional content of the oil you are considering? And what, if any, is the therapeutic effects that the carrier oil in question can assist in?
Then when it comes to the storing of carrier oil, treat them as you would a very expensive extra virgin olive oil! The best cooks would automatically say to keep them in the refrigerator. Those same professionals would also advise you not to over purchase. When purchasing a good carrier oil, buy no more than you will use in a months time and also store your oils in narrow necked, dark bottles. Why? Because one of the quickest ways for oils to spoil is through oxidation. Limit the effects of light and air and your oils will last longer.
Most carrier oils have a maximum shelf life of 6-8 months. Oils that are kept beyond their shelf life may turn rancid from oxidation or bacterial contamination which will leave them with a bitter or sour smell. These oils should and must be discarded!
Bitter almond oil should never be confused with, or substituted for sweet almond oil. Although is might smell wonderful, this synthetic almond contains prussic acid and can ultimately burn the skin.
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