Herb module
Xi Fan Lian
PassionflowerPassiflora incarnata
A vine with a wildly intricate flower, used to settle the Spirit and quiet a busy, restless mind.
Xi Fan Lian is passionflower, a climbing vine better known in Western herbalism than in the old Chinese texts. Traditional Chinese Medicine practitioners have come to describe it as a cooling herb that settles the Heart and Spirit. It leads Zoi's Brain + Mood formula, Xýlo™, where its job is to help the mind soften and come to rest.
Best functions
- Calms the Shen (Spirit) when the mind feels unsettled or overactive
- Nourishes Yin, the cool and restful side of the body
- Traditionally used to quiet a restless Heart and ease nervous tension
- Used to help the mind wind down toward rest in the evening
- Studies suggest its flavonoids work with the brain's own calming GABA system
Fascinating facts
- Passionflower is not included in the Chinese Materia Medica. Its Traditional Chinese Medicine profile has been described more recently by practitioners.
- In modern integrative practice, passionflower is valued for calming the Shen, the spirit that Traditional Chinese Medicine says makes its home in the Heart.
- The name comes from early Spanish missionaries in the Americas, who saw symbols of the Passion of Christ in the parts of the flower.
- This species is a climbing vine native to the southeastern United States. Its purple and white flowers have a crown of fine, wavy filaments that look almost too elaborate to be real.
In Traditional Chinese Medicine
Passionflower has been described as sweet and bitter in flavor and cool in nature, entering the Heart and Liver channels. It is grouped with the astringent herbs.
Biomedical deep dive
Xi Fan Lian Passionflower
From the Zoi Medicinals fact sheets’ Biomedical Details, with lines from Noa’s herb notes marked “Noa’s notes”.
On the fact sheet
- Xi Fan Lian (Passion flower, Passiflora incarnate) is not included in the Chinese Materia Medica, but has been described as cool, enters HT and LIV meridians; calms the Shen, tonifies Yin. Brain + Mood | Xýlo sheet
Key active constituents
- Flavonoids from passionflower, named in the Xýlo sheet's cited study title as acting through the GABA (calming) pathway.
Pharmacology and mechanisms
- Passionflower is one of several Xýlo herbs that have shown anti-anxiety effects in various studies.
- Passionflower has shown sedating (calming, sleep-promoting) properties in animal studies.
- Flavonoids such as chrysin and vitexin boost GABA-A receptors, the brain's main calming receptors. Noa’s notes
- In a randomized trial for GAD, it matched oxazepam with fewer side effects. Noa’s notes
- Reduced anxiety before surgery compared with placebo and pharmaceuticals in human randomized trials. Noa’s notes
- Sedating through GABA pathways; improves how quickly people fall asleep and sleep quality. Noa’s notes
What the research says
- In a clinical trial in people with generalized anxiety disorder (GAD), passionflower extract eased anxiety as well as the drug oxazepam, with fewer side effects (Sarris et al., Eur Neuropsychopharmacol 2011).
- Human studies of anxiety before surgery reported significant benefits from passionflower compared with placebo and pharmaceuticals (Sarris, Phytother Res 2018).
- In animal studies, flavonoids from passionflower had a sedative effect through the GABAergic (calming) pathway (Gazola et al., 2018).
Safety, interactions and cautions
- Every Zoi fact sheet: do not use if pregnant or breastfeeding unless directed by your health care practitioner.
- The Brain + Mood | Xýlo fact sheet cautions anyone with a medical condition or taking medication to consult their doctor before use.
- May potentiate CNS depressants: avoid using with benzodiazepines, sedatives, anti-anxiety medicines or alcohol unless supervised. Noa’s notes
- Caution in pregnancy. Noa’s notes
In these Zoi formulas
- ★ Brain + Mood | Xýlo (#1 on the fact sheet)
