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The Smell Of Lavender Is Relaxing

The Smell Of Lavender Is Relaxing

Chronic stress is a common precursor to the development of anxiety disorder and depression. Chronic stress can also exacerbate these disorders. Therefore, any activity that reduces stress can both prevent and benefit these disorders.

There are many natural ways to reduce stress, such as increasing the amount of time you spend relaxing, since relaxation reduces stress. Many people over the years have found the smell of lavender relaxing. Now, research has confirmed why the smell of lavender is relaxing.

You can read the press release of this research below:


The smell of lavender is relaxing, science confirms

Lavender works its relaxing magic all around us: from garden borders to bath bombs to fabric softener. But why not in our hospitals and clinics? And what is the science behind the magic?

Research published in Frontiers in Behavioral Neuroscience shows for the first time that the vaporized lavender compound linalool must be smelt - not absorbed in the lungs- to exert its calming effects, which could be used to relieve preoperative stress and anxiety disorders.

Soothing scents

"In folk medicine, it has long been believed that odorous compounds derived from plant extracts can relieve anxiety," says co-author Dr Hideki Kashiwadani of Kagoshima University, Japan.

Modern medicine has overlooked these scented settlers, despite a need for safer alternatives to current anxiolytic (anxiety-relieving) drugs like benzodiazepines.

Numerous studies now confirm the potent relaxing effects of linalool, a fragrant alcohol found in lavender extracts.

"However, the sites of action of linalool were usually not addressed in these studies," Kashiwadani points out.

Many assumed that absorption into bloodstream via the airway led to direct effects on brain cell receptors such as GABAARs - also the target of benzodiazepines. But establishing the true mechanism of linalool's relaxing effects is a key step in moving towards clinical use in humans.

A nose for success

Kashiwadani and colleagues tested mice to see whether it is the smell of linalool - i.e. stimulation of olfactory (odor-sensitive) neurons in the nose - that triggers relaxation.

"We observed the behavior of mice exposed to linalool vapor, to determine its anxiolytic effects. As in previous studies, we found that linalool odor has an anxiolytic effect in normal mice. Notably, this did not impair their movement." This contrasts with benzodiazepines, and linalool injections, whose effects on movement are similar to those of alcohol.

However, crucially there was no anxiolytic effect in anosmic mice - whose olfactory neurons have been destroyed - indicating that the relaxation in normal mice was triggered by olfactory signals evoked by linalool odor.

What's more, the anxiolytic effect in normal mice disappeared when they were pretreated with flumazenil, which blocks benzodiazepine-responsive GABAA receptors.

"When combined, these results suggest that linalool does not act directly on GABAA receptors like benzodiazepines do - but must activate them via olfactory neurons in the nose in order to produce its relaxing effects," explains Kashiwadani.

Coming to theaters near you

"Our study also opens the possibility that relaxation seen in mice fed or injected with linalool could in fact be due to the smell of the compound emitted in their exhaled breath."

Similar studies are therefore needed to establish the targets, safety and efficacy of linalool administered via different routes, before a move to human trials.

"These findings nonetheless bring us closer to clinical use of linalool to relieve anxiety - in surgery for example, where pretreatment with anxiolytics can alleviate preoperative stress and thus help to place patients under general anesthesia more smoothly. Vaporized linalool could also provide a safe alternative for patients who have difficulties with oral or suppository administration of anxiolytics, such as infants or confused elders."

REFERENCES:

Harada, Hiroki, et al. “Linalool Odor-Induced Anxiolytic Effects in Mice.” Frontiers, Frontiers, 25 Sept. 2018, www.frontiersin.org/articles/10.3389/fnbeh.2018.00241/full.


Disclaimer: anxietycentre.com is not responsible for the accuracy of news releases posted at anxietycentre.com by contributing institutions or for the use of any information throughout anxietycentre.com's system.


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Authors: Jim Folk, Marilyn Folk, BScN. Last updated November 20, 2018.

anxietycentre.com: Information, support, and coaching/counseling/therapy for problematic anxiety and its sensations and symptoms, including the latest in anxiety research: The Smell Of Lavender Is Relaxing.