Synopsis

Source of validity: Traditional
Rating (out of 5): 2

Citrus sinensis, commonly known as sweet orange, has a long history of traditional use in aromatherapy and herbal medicine for its purported calming and mood-enhancing effects. In historical and contemporary aromatherapy practices, the essential oil extracted from its peel is believed to promote relaxation, reduce stress, and support emotional well-being. These effects are typically attributed to its pleasant aroma and to certain volatile compounds, such as limonene and myrcene, which are thought to influence mood and relaxation responses through olfactory pathways. Traditional herbalists have sometimes linked these calming effects to support for the parasympathetic nervous system, which is responsible for rest-and-digest activities in the body. However, while there is some preliminary scientific research suggesting that Citrus sinensis essential oil inhalation may reduce markers of anxiety and induce relaxation in humans, robust clinical evidence specifically connecting Citrus sinensis to direct modulation or support of the parasympathetic nervous system is limited. Most available evidence is anecdotal or based on traditional use rather than rigorous scientific validation. Therefore, the use of Citrus sinensis to support the parasympathetic nervous system is primarily justified by tradition, with some suggestive but not definitive scientific support.

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