# Butterbur (Petasites hybridus)

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/butterbur
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-03-19
**Evidence Score:** 8 / 10
**Category:** European
**Also Known As:** Petasites hybridus, European butterbur, Purple butterbur, Bog rhubarb, Blatterdock, Capdockin, Flapperdock, Umbrella plant

## Overview

Butterbur (Petasites hybridus) is a perennial plant whose PA-free root extracts contain petasins as primary bioactive compounds. These compounds inhibit NF-κB signaling pathways to provide [anti-inflammatory](/ingredients/condition/inflammation) and spasmolytic effects.

## Health Benefits

• [Anti-inflammatory](/ingredients/condition/inflammation) effects: PA-free root extract (≥15% petasins) reduces NF-κB biomarkers in preclinical models (preliminary evidence)
• [Oxidative stress](/ingredients/condition/antioxidant) reduction: Standardized Bulgarian root extract decreases oxidative stress biomarkers via ELISA testing (preliminary evidence)
• Spasmolytic activity: Petasin identified as primary spasmolytic agent in pharmaceutical preparations (preliminary evidence)
• Cellular apoptosis induction: Flow cytometry shows extract induces apoptosis/necrosis in cellular models (preliminary evidence)
• Note: All evidence is from preclinical studies only; no human clinical trials were found in the research

## Mechanism of Action

Petasins, the primary bioactive compounds in butterbur, inhibit nuclear factor-κB (NF-κB) signaling pathways, reducing [inflammatory](/ingredients/condition/inflammation) mediator production. The standardized extracts also demonstrate spasmolytic activity by modulating calcium channels in smooth muscle tissue. Additionally, butterbur compounds reduce [oxidative stress](/ingredients/condition/antioxidant) through antioxidant enzyme pathway activation.

## Clinical Summary

Current evidence for butterbur consists primarily of preclinical studies examining PA-free root extracts standardized to ≥15% petasins. Bulgarian standardized root extracts have shown measurable decreases in [oxidative stress](/ingredients/condition/antioxidant) biomarkers via ELISA testing in laboratory models. [NF-κB](/ingredients/condition/inflammation) biomarker reduction has been documented in preliminary animal studies, though human clinical data remains limited. The evidence strength is considered preliminary pending larger controlled human trials.

## Nutritional Profile

Butterbur (Petasites hybridus) root/rhizome contains negligible macronutrients in therapeutic extract form. Key bioactive compounds include: Sesquiterpenes (primary actives) — petasin and isopetasin collectively comprising 0.1–0.4% of raw root dry weight, concentrated to ≥15% petasins in standardized pharmaceutical extracts (e.g., Ze 339, Petadolex). Pyrrolizidine alkaloids (PAs) — present in raw plant at variable but potentially hepatotoxic levels (senkirkine, integerrimine); PA-free extracts are processed via CO2 supercritical extraction to reduce PAs to <0.1 ppm (below detection thresholds). Polyphenols — caffeic acid esters (e.g., petasitenine-related phenolics) present in trace amounts. Flavonoids — quercetin and kaempferol glycosides detected at low concentrations (<0.05% dry weight). Inulin-type fructans — present in raw rhizome as storage carbohydrates (~5–15% dry weight), though largely absent in concentrated extracts. Essential oils — trace volatile sesquiterpene fractions (<0.1%). Fiber content in raw root is moderate (~8–12% dry weight) but irrelevant in extract form. Vitamins and minerals are negligible and not therapeutically significant. Bioavailability notes: Petasin and isopetasin exhibit moderate oral bioavailability with Tmax ~1–2 hours post-ingestion of standardized extract; lipophilic nature of sesquiterpenes suggests absorption enhanced with dietary fat; PA-free supercritical CO2 extraction preserves petasin content while eliminating hepatotoxic alkaloids, making the standardized extract the only form with an established safety profile for human use.

## Dosage & Preparation

No clinically studied dosage ranges are available from human trials. Preclinical studies used powdered extracts standardized to ≥15% petasins from rhizomes, but specific dosing for humans has not been established. Consult a healthcare provider before starting any new supplement.

## Safety & Drug Interactions

Raw butterbur contains potentially hepatotoxic pyrrolizidine alkaloids (PAs), making PA-free extracts essential for safety. Common side effects may include digestive upset, headache, and fatigue in sensitive individuals. Butterbur may interact with anticoagulant medications due to potential blood-thinning effects. Pregnant and breastfeeding women should avoid butterbur due to insufficient safety data.

## Scientific Research

The available research lacks human clinical trials, RCTs, or meta-analyses for butterbur. All evidence comes from preclinical studies using PA-free extracts standardized to ≥15% petasins, showing effects on [oxidative stress](/ingredients/condition/antioxidant) and [NF-κB](/ingredients/condition/inflammation) biomarkers, but without human trial data or PubMed PMIDs provided.

## Historical & Cultural Context

Traditional uses are not specified in the available research. Modern pharmaceutical applications focus on PA-free extracts for potential spasmolytic and [anti-inflammatory](/ingredients/condition/inflammation) properties, with emphasis on removing toxic pyrrolizidine alkaloids for safe use.

## Synergistic Combinations

Insufficient research to determine synergistic combinations

## Known Interactions

| Substance | Severity | Summary | URL |
|---|---|---|---|
| Devil's Claw | SAFE | 🟢 SAFE — Butterbur and Devil's Claw can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/devils-claw |
| Arnica | SAFE | 🟢 SAFE — Butterbur and Arnica can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/arnica |
| Comfrey | SAFE | 🟢 SAFE — Butterbur and Comfrey can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/comfrey |
| Marshmallow Root | SAFE | 🟢 SAFE — Butterbur and Marshmallow Root can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/marshmallow-root |
| Slippery Elm | SAFE | 🟢 SAFE — Butterbur and Slippery Elm can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/slippery-elm |
| Isotretinoin | SAFE | 🟢 SAFE — Butterbur and Isotretinoin can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/isotretinoin |
| Dapsone | SAFE | 🟢 SAFE — Butterbur and Dapsone can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/dapsone |
| Azathioprine | SAFE | 🟢 SAFE — Butterbur and Azathioprine can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/azathioprine |
| Mycophenolate | SAFE | 🟢 SAFE — Butterbur and Mycophenolate can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/mycophenolate |
| Cyclosporine | SAFE | 🟢 SAFE — Butterbur and Cyclosporine can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/cyclosporine |
| Febuxostat | SAFE | 🟢 SAFE — Butterbur and Febuxostat can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/febuxostat |
| Penicillamine | SAFE | 🟢 SAFE — Butterbur and Penicillamine can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/penicillamine |
| Turmeric Latte | SAFE | 🟢 SAFE — Butterbur and Turmeric Latte can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/turmeric-latte |
| Matcha | SAFE | 🟢 SAFE — Butterbur and Matcha can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/matcha |
| Kombucha | SAFE | 🟢 SAFE — Butterbur and Kombucha can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/kombucha |
| Energy Drinks | SAFE | 🟢 SAFE — Butterbur and Energy Drinks can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/energy-drinks |
| Nicotine | SAFE | 🟢 SAFE — Butterbur and Nicotine can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/nicotine |
| Vitamin E | SAFE | 🟢 SAFE — Butterbur and Vitamin E can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/vitamin-e |
| Vitamin B1 | SAFE | 🟢 SAFE — Butterbur and Vitamin B1 can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/vitamin-b1 |
| Vitamin B2 | SAFE | 🟢 SAFE — Butterbur and Vitamin B2 can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/vitamin-b2 |

## Frequently Asked Questions

### What are petasins in butterbur supplements?

Petasins are the primary bioactive sesquiterpene compounds in butterbur that provide anti-inflammatory effects through NF-κB pathway inhibition. Quality supplements standardize extracts to contain ≥15% petasins for therapeutic potency.

### Why must butterbur be PA-free?

Raw butterbur contains pyrrolizidine alkaloids (PAs) that can cause severe liver damage and are potentially carcinogenic. PA-free processing removes these toxic compounds while preserving beneficial petasins.

### How does butterbur reduce inflammation?

Butterbur's petasin compounds inhibit nuclear factor-κB (NF-κB) signaling pathways, which reduces production of inflammatory mediators like cytokines and prostaglandins. This mechanism provides systemic anti-inflammatory effects.

### What is the typical butterbur dosage?

Standardized PA-free butterbur extracts are typically dosed at 50-75mg twice daily, providing approximately 15% petasins. Higher doses should only be used under healthcare provider supervision due to potential side effects.

### Can butterbur cause liver problems?

Only non-PA-free butterbur products pose liver toxicity risks due to pyrrolizidine alkaloid content. Properly processed PA-free extracts have significantly reduced hepatotoxicity concerns, though liver function monitoring may still be advisable with long-term use.

### Is butterbur safe during pregnancy and breastfeeding?

Butterbur is not recommended during pregnancy or breastfeeding due to insufficient safety data and the presence of pyrrolizidine alkaloids (PAs) that may pose risks to fetal development. Women of childbearing age should consult a healthcare provider before use. Only PA-free standardized extracts should be considered, and even then, medical clearance is advised.

### Does butterbur interact with common medications?

Butterbur may interact with medications metabolized by cytochrome P450 enzymes, though clinical evidence is limited. It should be used cautiously with anticoagulants, antiplatelet agents, and anti-inflammatory drugs due to its own bioactive properties. Consult a healthcare provider before combining butterbur with prescription medications.

### What does the clinical research actually show about butterbur's effectiveness?

Most clinical evidence for butterbur focuses on migraine prevention, with several studies demonstrating modest benefits comparable to pharmaceutical alternatives. However, research on anti-inflammatory and antioxidant mechanisms relies primarily on preclinical and preliminary in vitro models rather than robust human trials. The quality and quantity of human clinical evidence remains limited compared to conventional treatments.

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