Essential oils are absorbed into the body two ways; through the skin and through nasal inhalation. Our sense of smell, controlled by the olfactory system, is some 10,000 times greater than any other sense. The olfactory system is directly linked to the limbic system, which is responsible for our emotional state, memory, and certain regulatory function.
Essential oils also penetrate the skin, or the integumentary system. Because essential oils have a low molecular weight and are organic in nature, they are absorbed through the pores and hair follicles of the skin, and unlike synthetic chemicals, they do not accumulate in the body. Absorption can take place anywhere from 15 minutes to 12 hours, and take from 3 to 6 hours to be metabolized in a healthy body. Excessive fat or toughened skin may slow down the rate of absorption; whereas heat, water, exercise, or broken skin may speed it up.
