Evidence supporting the use of: Basil
For the body system: Parasympathetic Nervous System

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Synopsis

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

Basil (Ocimum basilicum) has a long history of use in traditional medicine systems, particularly in Ayurveda and folk medicine, where it is often considered a calming or adaptogenic herb. These uses align with the broad goal of supporting the body’s response to stress, which is often associated with the parasympathetic nervous system—responsible for "rest and digest" activities. In Ayurveda, holy basil (Ocimum tenuiflorum, or tulsi) is especially prized for its purported calming effects and its ability to help balance the nervous system.

However, while there is some preliminary scientific research on basil (particularly holy basil) regarding its potential anxiolytic (anxiety-reducing) and adaptogenic effects, the evidence is limited and does not specifically focus on direct modulation of the parasympathetic nervous system. Most studies are small, animal-based, or use related species, and typically measure general stress markers, cortisol levels, or behavioral outcomes. There is a lack of robust, high-quality human research directly linking basil consumption to measurable support of the parasympathetic nervous system. Thus, the use of basil for this purpose is primarily justified by traditional use, with only modest scientific support at present.

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