Posted by Dorine King on November 30th, 2016 in
Essential oils are not cooking oils like olive oil, canola oil, or sesame oil. These are called fixed or base oils. They are different from essential oils. They feel oily to the touch and when they are exposed to air, they become rancid and do not evaporate. By contrast, essential oils are not oils, they do not leave an oily residue, they do not become rancid, and they evaporate readily. Essential oils are a volatile substance obtained from botanical raw material by either steam distillation or by cold pressing.