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A Pilot Study on the Physiological Effects of Three Essential Oils in Humans
Natural Product Communications
|December 15, 2018
Summary
Inhaling sandalwood essential oils significantly reduced stress indicators like blood pressure and cortisol in humans. These findings suggest essential oils aid in physiological stress recovery.
Area of Science:
- Aromatherapy and its impact on human physiology.
- Psychoneuroendocrinology and stress response.
- Phytochemistry of essential oils.
Background:
- Psychological stress triggers measurable physiological and endocrine responses.
- Essential oils from plants like sandalwood and lavender are traditionally used for relaxation.
- Quantifying the physiological effects of essential oil inhalation is crucial for validating their therapeutic potential.
Purpose of the Study:
- To investigate the physiological effects of inhaling East Indian and Western Australian sandalwood essential oils, and lavender oil, on humans under experimental stress.
- To assess the impact of these essential oils on stress biomarkers including blood pressure, heart rate, skin conductance, and salivary cortisol.
- To determine if essential oils can mitigate stress responses and enhance recovery.
Main Methods:
- 32 human participants were exposed to experimental stress.
- Physiological parameters including blood pressure, heart rate, and skin conductance were continuously monitored.
- Salivary cortisol levels were measured as an endocrine stress indicator using time-resolved fluoroimmunoassay.
- Data was statistically analyzed to compare essential oil exposure groups with a control group.
Main Results:
- Sandalwood essential oils (both East Indian and Western Australian) significantly reduced systolic blood pressure, particularly during the recovery phase.
- Western Australian sandalwood oil showed a distinct reduction in salivary cortisol levels during the recreation phase compared to the control.
- Heart rate and skin conductance response data indicated a trend towards stress reduction, though not always statistically significant across all groups.
Conclusions:
- Inhalation of sandalwood essential oils can effectively alleviate physiological stress responses, including lowering blood pressure.
- Western Australian sandalwood oil demonstrated a notable capacity to reduce endocrine stress markers like salivary cortisol, aiding in post-stress recovery.
- The study supports the use of essential oils as a complementary approach to manage psychological stress and improve physiological recovery.
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