Evidence supporting the use of: Lavandula (unspecified)
For the body system: Parasympathetic Nervous System

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Synopsis

Source of validity: Scientific
Rating (out of 5): 4

Lavandula, commonly known as lavender, has a long history of traditional use for promoting relaxation and calming the nervous system, but in recent years, scientific research has provided validation for its effects on the parasympathetic nervous system. Several studies have demonstrated that lavender essential oil, particularly its primary constituents linalool and linalyl acetate, can modulate autonomic nervous system activity. Inhalation or topical application of lavender oil has been associated with increased parasympathetic (rest-and-digest) activity, as indicated by measures such as heart rate variability, decreased heart rate, and reduced blood pressure. Randomized controlled trials and meta-analyses have shown that lavender aromatherapy can reduce anxiety, improve sleep quality, and promote relaxation in both clinical and healthy populations. These effects are believed to be mediated through both olfactory pathways and direct pharmacological action on neurotransmitter systems, including GABAergic modulation. Although the majority of studies have focused on subjective measures like anxiety and sleep, physiological assessments support the conclusion that lavender can activate the parasympathetic nervous system. While there are some methodological variances across studies, the overall body of evidence supports the use of Lavandula to support the parasympathetic nervous system, earning it a relatively high evidence rating.

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