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Researchers also found that the blood of participants exposed to the rosemary-scented room had detectable levels of 1,8-cineole, an active compound found in rosemary. The more 1,8-cineole they absorbed in their bloodstream, the more positive their results were.
“This compound is present in rosemary but has not previously been demonstrated to be absorbed into blood plasma in humans,” study researcher Dr. Mark Moss told MSNBC (3). “It is our view that the aroma therefore acts like a therapeutic drug, rather than any effects being a result of the more sensory properties of the aroma.”
The chemicals are also believed to have directly stimulated the olfactory nerve in the nose, which could have effects on brain functioning.
“We deliberately set them a lot of tasks, so it’s possible that people who multi-task could function better after sniffing rosemary oil”, said researcher Jemma McCready. “There was no link between the participants’ mood and memory. This suggests performance is not influenced as a consequence of changes in alertness or arousal.”
The herb also helped improve brain health thanks to its carnosic acid and rosmarinic acid, which impairs the growth of cancer cells and prevent Alzheimer’s by fighting free radical damage and protecting against beta amyloid-induced neurodegeneration in the hippocampus (4,5).
The Future of Aromatherapy
Researcher Dr. Mark Moss is excited at the real-life implications of the study: “… [we] focused on prospective memory, which involves the ability to remember events that will occur in the future and to remember to complete tasks at particular times. This is critical for everyday functioning, for example when someone needs to remember to post a birthday card or to take medication at a particular time.”
“Plants are very complex organisms and contain many different active compounds and these vary in concentration from plant to plant and even within the same plant over the course of a day,” he says. “The accumulation of knowledge regarding possible impacts of plant aromas and extracts could potentially lead to an identification of the best combination to promote specific effects.”
Dr. Alan Hirsch, director of the Smell and Taste Treatment and Research Foundation in Chicago, who was not involved in the study, agrees: “[the study] opens up the doorway for us to explore other odors and how they affect people” (6).
How To Use Rosemary
To help boost your memory, fill your office with the scent of rosemary by diffusing a few drops of high-quality organic essential oil using a diffuser. You can also keep a rosemary plant by your desk.
For an on-the-go solution, mix a drop of rosemary oil in a teaspoon of coconut oil and carry it in a small cosmetic tin. Rub a bit of oil on your wrists as needed to keep your brain sharp!
