# Buddleja (Buddleja davidii)

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/buddleja
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-03-31
**Evidence Score:** 2 / 10
**Category:** Other
**Also Known As:** Butterfly bush, Orange eye, Summer lilac, Buddleia davidii, Buddleia, Nicodemia davidii, David's buddleja, Smokebush

## Overview

Buddleja davidii, commonly called butterfly bush, contains bioactive iridoid glycosides and flavonoids such as luteolin and apigenin that drive its [anti-inflammatory](/ingredients/condition/inflammation) and antioxidant effects. These compounds inhibit pro-inflammatory enzymes and scavenge [free radical](/ingredients/condition/antioxidant)s, though supporting evidence remains limited to in vitro and preclinical studies.

## Health Benefits

• [Anti-inflammatory](/ingredients/condition/inflammation) activity demonstrated in vitro with flower extracts (IC50: 28.6-125.1 mg/L) - preliminary evidence only
• Antibacterial effects shown by stem extracts against various pathogens (MIC: 60-100 mg/L) - in vitro studies only
• Antioxidant properties via DPPH and ABTS [free radical scaveng](/ingredients/condition/antioxidant)ing attributed to phenylethanoid glycosides and flavonoids - laboratory evidence only
• Skin [anti-aging](/ingredients/condition/longevity) potential through flower extract compounds like crocin and quercetin - limited to in vitro testing
• Tyrosinase inhibition by leaf extracts (IC50: 38.17 mg/L) suggesting skin-lightening properties - preliminary cell-based evidence

## Mechanism of Action

Flavonoids in Buddleja davidii, particularly luteolin and apigenin, suppress the NF-κB signaling pathway and inhibit cyclooxygenase (COX) enzymes, reducing [prostaglandin](/ingredients/condition/inflammation) synthesis and downstream inflammatory mediators. Iridoid glycosides such as aucubin contribute to [antioxidant activity](/ingredients/condition/antioxidant) by donating hydrogen atoms to neutralize DPPH and ABTS radicals, reducing oxidative stress at the cellular level. Stem-derived phenolic compounds disrupt bacterial cell membrane integrity against pathogens including Staphylococcus aureus and Escherichia coli, with minimum inhibitory concentrations (MIC) ranging from 60 to 100 mg/L in vitro.

## Clinical Summary

Current evidence for Buddleja davidii is restricted to in vitro cell-culture and laboratory assays; no peer-reviewed human clinical trials have been published as of 2024. Flower extract demonstrated [anti-inflammatory](/ingredients/condition/inflammation) activity with IC50 values of 28.6–125.1 mg/L in cell-based models, while stem extracts showed antibacterial effects at MIC values of 60–100 mg/L against selected gram-positive and gram-negative bacteria. [Antioxidant](/ingredients/condition/antioxidant) capacity has been quantified via DPPH and ABTS radical scavenging assays, though these results do not translate directly to confirmed human bioavailability or efficacy. The overall evidence base is preliminary, and controlled human trials are necessary before any therapeutic claims can be substantiated.

## Nutritional Profile

Buddleja davidii is not a food ingredient and lacks conventional nutritional profiling (macronutrients, vitamins, minerals) in the literature. Bioactive compounds are the primary characterized constituents: Phenylethanoid glycosides are the dominant class, including acteoside (verbascoside) at approximately 0.5-2.1% dry weight in leaf/flower tissue, and echinacoside at lower concentrations (~0.1-0.5% dry weight). Flavonoids include luteolin, apigenin, linarin (acacetin-7-rutinoside), and buddleoside (luteolin-7-glucuronide), collectively estimated at 0.8-3.0% dry weight in flowers. Iridoid glycosides such as aucubin and catalpol are present in leaf material at trace to moderate levels (~0.05-0.3% dry weight). Caffeic acid derivatives and hydroxycinnamic acid esters contribute to total phenolic content, measured at approximately 15-45 mg GAE/g dry weight in flower extracts. Saponins and diterpenoids have been detected in stem bark. Essential oil fractions from flowers contain minor quantities of linalool, geraniol, and lilac aldehydes. Fiber, protein, and fat content are not meaningfully characterized as this plant is not consumed as food. Bioavailability of phenylethanoid glycosides is considered moderate based on related compounds in other species, with gut microbiota potentially hydrolyzing glycosidic bonds to release aglycones; no specific human bioavailability studies for B. davidii exist.

## Dosage & Preparation

No clinically studied dosage ranges exist for human use. In vitro studies used extract concentrations up to 200 mg/L, which showed biological activity without cytotoxicity in human skin fibroblast cells. Consult a healthcare provider before starting any new supplement.

## Safety & Drug Interactions

No formal human safety or toxicology studies have been conducted on Buddleja davidii extracts, making its safety profile in supplements largely unknown. The plant is classified as an invasive species in many regions and is not approved by the FDA or EFSA as a dietary supplement ingredient, raising regulatory concerns. Theoretical interactions with [anti-inflammatory](/ingredients/condition/inflammation) drugs (NSAIDs, corticosteroids) and anticoagulants are possible given its COX-inhibiting flavonoid content, though no interaction data exist in humans. Buddleja davidii should be avoided during pregnancy and breastfeeding due to a complete absence of safety data in these populations.

## Scientific Research

No human clinical trials, randomized controlled trials, or meta-analyses have been conducted on Buddleja davidii. Current evidence is limited to in vitro assays and preclinical studies examining [antioxidant](/ingredients/condition/antioxidant), [anti-inflammatory](/ingredients/condition/inflammation), antibacterial, and antityrosinase activities at concentrations ranging from 28.6-200 mg/L.

## Historical & Cultural Context

Buddleja species have been used for centuries in traditional Asian and Mediterranean medicine systems to treat wounds, liver diseases, bronchial complaints, eye issues, ulcers, and as diuretics and analgesics. Historical ethnopharmacological records document B. officinalis use for ophthalmic conditions and B. globosa for wound healing, though B. davidii specific traditional use is less documented.

## Synergistic Combinations

Quercetin, Luteolin, Green Tea Extract, Resveratrol, Vitamin C

## Frequently Asked Questions

### What are the active compounds in Buddleja davidii?

Buddleja davidii contains iridoid glycosides (including aucubin), flavonoids (luteolin, apigenin, and acacetin), phenylpropanoids, and phenylethanoid glycosides. These compounds are primarily concentrated in the flowers and stems and are responsible for the plant's observed antioxidant and anti-inflammatory activity in laboratory studies.

### Is Buddleja davidii safe to consume as a supplement?

No human clinical safety data exist for Buddleja davidii as a supplement, so its safety cannot be confirmed. It is not recognized as a safe dietary ingredient by the FDA or EFSA, and individuals with inflammatory conditions who take NSAIDs or blood thinners should avoid it due to potential additive effects from its COX-inhibiting flavonoids.

### Does Buddleja davidii have antibacterial properties?

In vitro studies show that stem extracts of Buddleja davidii inhibit bacterial growth against pathogens such as Staphylococcus aureus and Escherichia coli at minimum inhibitory concentrations of 60–100 mg/L. These findings are preliminary and derived solely from laboratory assays, with no human or animal infection studies confirming clinical antibacterial efficacy.

### How does Buddleja davidii reduce inflammation?

Flower extracts of Buddleja davidii suppress inflammation primarily through flavonoids like luteolin that inhibit the NF-κB transcription pathway and cyclooxygenase enzymes, reducing prostaglandin and cytokine production. Anti-inflammatory IC50 values of 28.6–125.1 mg/L have been recorded in cell-based assays, though this potency has not been evaluated in living organisms.

### Can Buddleja davidii be used during pregnancy?

Buddleja davidii should not be used during pregnancy or breastfeeding due to a complete lack of reproductive safety data in humans or animals. Some iridoid glycosides found in related plant species have shown cytotoxic activity in preclinical models, suggesting a theoretical risk that has not been ruled out for this species.

### What is the current quality of clinical evidence supporting Buddleja davidii supplements?

Most research on Buddleja davidii consists of in vitro laboratory studies and animal models rather than human clinical trials. While flower extracts show anti-inflammatory activity and stem extracts demonstrate antibacterial effects in controlled settings, these results have not yet been replicated in rigorous human studies. Current evidence is considered preliminary, and larger controlled trials are needed to establish safety and efficacy in humans.

### What are the different forms of Buddleja davidii available as supplements, and how do they differ?

Buddleja davidii is available as dried flower extracts, stem extracts, powdered leaf formulations, and standardized extracts targeting phenylethanoid glycosides or flavonoid content. Extract forms are typically more concentrated than powdered preparations, potentially offering higher bioavailability of active compounds, though comparative effectiveness studies between forms have not been conducted in humans. Standardized extracts may provide more consistent potency across batches compared to non-standardized preparations.

### Who should avoid taking Buddleja davidii supplements?

Individuals allergic to plants in the Scrophulariaceae family should avoid Buddleja davidii due to potential cross-reactivity. Those taking antibacterial or anti-inflammatory medications should consult a healthcare provider before supplementing, as potential interactions have not been fully characterized. Additionally, individuals with existing liver or kidney conditions should seek medical guidance, as safety data in these populations is limited.

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*Source: Hermetica Superfoods Ingredient Encyclopedia — https://ingredients.hermeticasuperfoods.com*
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