The Nose Knows
Concentrated plant extracts have been used medicinally for over 6,000 years, promising relief from anxiety, stress, depression, and a whole slew of other mental and physical ailments . But apart from ancient tradition, there might in fact be some science behind these scents. Aromatherapy is believed to stimulate smell receptors in the nose, which then send messages through the nervous system and to the part of the brain the brain that controls emotions . From hospitals to health spas, essential oils are administered through inhalants, diffusers, and massage to trigger positive emotions and calm the bad.
While it may not be surprising that a pleasant scent can improve one’s mood and freshen up a musty room, researchers have yet to reach a consensus on the benefits of essential oils. Consider lavender oil, most popular for its purported “tension taming” effects. Recent research showed sniffing these aromatic florals along with rosemary reduced stress in graduate nursing students during exams . Another study, however, found the sweet-smelling scent showed few signs of reducing anxiety in dental patients dreading upcoming procedures, though it did seem to lower anxiety in those experiencing more immediate stress . To confuse matters more, one of the largest studies on aromatherapy to date found no evidence of lavender’s stress-reducing properties when measuring heart rate, blood pressure, stress hormones, and immune function . In the same study, it was lemon oil, a suspected stimulant, that showed the most promise to boost subjects’ mood, though without any measurable physiological effects . Still, despite consistency in the findings, researchers aren’t ready to write off aromatherapy just yet. With more data and greater insight into the mind’s physiology, there may yet be a way to make sense of these sneaky scents.
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