Aromatherapy: Nice smell, but no health benefit the Daily Mail
The growing popularity of aromatherapy in Britain has led to a £20million-a-year
industry in oils bought over the counter, plus a booming business in spas and
health farms. Surveys show three out of four people believe the treatment
works. But a psychologist who specialises in the power of scent says his
experiments expose a massive marketing exercise which has no scientific basis.
The study was designed by a psychologist to test if aromatherapy could reduce a person’s pain level. Subjects put their arms in cold water for 15 minutes and then either were exposed to the smell of lemon, or machine oil. The study’s results said that people who smelled either lemon or machine oil experienced more pain than people who smelled nothing. The author concluded that aromatherapy did not work.
I’d like to get a hold of the original article to take a look at the methods of this study, because I can see some issues right off the bat.
First, did the study use real essential oils, or a manufactured synthetic lemon smell?
Second, in the aromatherapy books I have read, I have not seen lemon listed as a pain reliever. In fact, some books list it as a stimulant to the nervous system. This could potentially be a reason the people in the study felt worse.
Third, how much lemon did they smell and for how long? A dosage that is too high or too low might have different effects.
Fourth, inhalation is not the only method used in aromatherapy. Would the study have had different results if the lemon essential oil had been applied to skin, or massaged in? (You could have had controls where water was applied to the skin and the test subject was massaged with no essential oil.)
Fifth, how was bias controlled for? If the study was not blinded, it’s possible the peopleadministeringg the test could have been subtlycuingg the test subjects.
I would like to have seen a different essential oil, one that is more calming such as lavender, used instead.
It’s unfortunate that a study like this is out there, because at most, all it can say is that smelling the scent of lemons does not relieve the pain caused by putting your arm in ice cold water for 15 minutes. There are some though that will try to say that the entire field of aromatherapy does not work and is a waster of money.
Aromatherapy Guide