Passion Flower

Passiflora incarnata · the climber, weighed by the flowering herb

All articles checked for accuracy against the GB NHC Register and all sources have citations with verified links to their relevant studies.

Passion flower is a striking climbing plant whose dried aerial herb appears in traditional evening preparations. WellsparQ lists Passiflora incarnata as the lead botanical in its EveningCalm Blend and explains what that means for formulation and evidence.

This article summarises what passion flower (Passiflora incarnata) is, which plant part is used, the main phytochemicals, how WellsparQ measures and declares it in a product, the regulatory status for traditional herbal products in Europe, what the clinical literature says in context, and sensible safety notes for consumers.

Ingredient Snapshot

What it is

A climbing herb with intricate, distinctive flowers used as an aerial (above‑ground) botanical.

Where from

Passiflora incarnata (aerial parts: leaf, stem, tendril, flower)

Known for

Contains flavonoids (notably vitexin and isovitexin) and has been used traditionally in evening/herbal preparations.

In WellsparQ

• EveningCalm BlendPassion Flower — 100 mg

Passion flower is one of the great ornamental climbers — the intricate, almost architectural bloom that gardeners grow for its own sake. Behind the flower is a long tradition of use of the whole above-ground herb, first recorded among Indigenous peoples of the Americas and later adopted into European and North American herbal practice ^¹. At WellsparQ it is the lead botanical note in an evening formula: a named species, weighed and declared. As the factsheet card records, it is the "first ingredient on the label" in EveningCalm Blend, ahead of chamomile, lemon balm and lavender.

The plant, and which part we use

The genus Passiflora is large, but the medicinal species is maypop — Passiflora incarnata L. The part used is the aerial (above-ground) part: leaf, stem, tendril and flower, harvested and dried ^¹. This is worth stating, because passion fruit (from P. edulis) is a different food product; the herb here is grown for the aerial parts, not the fruit. As a botanical, passion flower is naturally suitable for vegetarians and vegans; kosher and halal status follows the finished product's certification.

What is in the herb

Passion flower's chemistry is dominated by flavonoids, with smaller supporting groups.

A 2023 review in Food Chemistry summarised the phytochemistry and composition of the genus, and is a useful reference for the flavonoid profile ^¹. Laboratory work has explored a GABAergic mechanism for the sedative activity of Passiflora flavonoids — that is, an interaction with the brain's GABA signalling — as reported in Biomedicine & Pharmacotherapy in 2018 ^². We report this as mechanistic laboratory research, not as a statement about what a WellsparQ capsule does in a person.

How WellsparQ measures it

Passion flower appears in one formula, where it leads.

Source: WellsparQ Supplements Database. Placing passion flower first, at 100 mg, mirrors its role in traditional evening/wind-down preparations — but "traditional use" is a regulatory and historical description, not proof of effect, and we treat it as such below.

The regulatory picture — a traditional-use monograph

Passion flower is one of the botanicals with a formal European document. The EMA Committee on Herbal Medicinal Products (HMPC) has published a herbal monograph on Passiflora incarnata L., herba ^³. This needs reading correctly. The monograph classifies passion-flower-herb preparations as traditional herbal medicinal products — a status granted on the basis of long-standing use (at least 30 years, including 15 in the EU) and plausibility, not on confirmatory clinical trials ^³. The traditional-use indication it records is for the relief of mild symptoms of mental stress and to aid sleep ^³.

That is a regulatory and historical statement about a class of registered traditional herbal medicines. WellsparQ food supplements are not registered herbal medicines, and we do not present the monograph as a supplement claim.

What the trials show — read as evidence

Beyond tradition, there is a modest and mixed clinical literature: small randomised trials of Passiflora extracts in anxiety and sleep contexts, and studies on its use before dental and surgical procedures, alongside reviews that consolidate this work while noting small samples, varied preparations and short durations ^¹². We report these as findings by named researchers, with their limitations — a small trial in a specific setting is not a general promise to someone taking a 100 mg herb capsule in the evening. Rooted in nature. Backed by research, and told straight about how far that research reaches.

Safety and sensible use

Passion flower herb is generally well tolerated at traditional doses; reported effects are usually mild, such as drowsiness ^³. Sensible cautions:

• Drowsiness. Because it is used to aid sleep, it may cause sedation; take care with driving or machinery, and with alcohol or other sedatives ^³.
• Pregnancy and breastfeeding. Safety is not established; the HMPC does not recommend use in pregnancy and breastfeeding ^³.
• Medication and children. Anyone on medication (particularly sedatives) should ask a GP or pharmacist first; the traditional-use indication is for adults ^³.

Where it fits your day

Passion flower is an old evening plant — the flowering herb brought forward as the lead note in a wind-down formula. In EveningCalm Blend it is declared at 100 mg, first on the label, from named Passiflora incarnata. A measured part of an evening rhythm, not a headline act. It's a lifestyle.