In a study done in a Montreal Shopping Center an increase in sales of 14% was achieved with a fragrance that was released into the shopping center. (Journal of Service Research, vol 8, p 181)

In a supermarket in the U.S. it was observed that when the smell of freshly baked bread is released into the air the sales in the bakery section tripled. (Hirsch, 1995, International Journal of Aromatherapy).

In a study where the smell of lavender was released during break time in a workplace it was detected that this prevented the employees from regressing in their performance. (sakamoto , et al, 2006, cited at http://chemse.oxfordjournals.org

According to a study in America a fragrance released in a casino setting increased the casino profits by 48%. (Hirsch, 1995, Psychology and Marketing)

In a study that is being conducted in Japan natural volatile oils (aromatic fragrances) are being experimented on in connection with helping Alzheimer patients.

In a university in Australia fragrances are being used to diagnose such brain related ailments as Alzheimer, Huntington and Parkinson’s diseases, schizophrenia and obsessive compulsive disorder (Miyazawa, 2006, Inhibition of Acetylcholinesterase Activity by Tea Tree Oil & Constituent Terpenoids)

Doctors at the Duke University Medical Center use a variety of essences to relieve depression and mood swings in women going through menopause. The use of essences to impact mental state or behaviour is called aromatherapy.