Herbs (Global Traditional) · Native American
Boneset (Eupatorium perfoliatum) (Eupatorium perfoliatum)
Moderate Evidencebotanical1 PubMed Study
Hermetica Superfood Encyclopedia
Boneset (Eupatorium perfoliatum) contains sesquiterpene lactones like eupafolin and polysaccharides that may enhance immune function. The polysaccharides appear to stimulate macrophage activity while sesquiterpene lactones provide anti-inflammatory effects.
Boneset (Eupatorium perfoliatum) is a perennial herb native to eastern and central North America, growing 1-4 feet tall with distinctive perfoliate leaves and white flower clusters. The dried aerial parts (leaves and flowering tops) are harvested in late summer or early fall and prepared as hot water infusions or ethanol tinctures to extract polysaccharides, sesquiterpene lactones, and flavonoids.
No human clinical trials, randomized controlled trials, or meta-analyses have been conducted on boneset. WebMD states there is no good scientific evidence supporting its traditional uses, with only in vitro research showing potential antibacterial and cytotoxic properties comparable to chlorambucil in cell cultures.
No clinically studied dosage ranges exist. Traditional preparations include hot water infusions (steep dried herb 10-30 minutes) or ethanol tinctures (1/3 to 1/2 jar dried herb in alcohol), but these are unstandardized and large doses cause severe diarrhea and vomiting. Consult a healthcare provider before starting any new supplement.
Boneset (Eupatorium perfoliatum) is a medicinal herb rather than a nutritional food source; macronutrient and caloric content are negligible at typical therapeutic doses (dried herb preparations typically 1-3g per serving). Key bioactive compounds include: sesquiterpene lactones (euperfolitin, eufoliatin, eufoliatorin, and yupapin at approximately 0.1-0.5% dry weight), immunostimulatory polysaccharides (4-O-methylglucuronoarabinoxylans, estimated 3-8% dry weight), flavonoids including quercetin, kaempferol, and astragalin (combined approximately 0.5-1.2% dry weight), caffeic acid derivatives including chlorogenic acid and cynarin (approximately 0.3-0.8% dry weight), diterpenes including dendroidinic acid and hebeclinolide (trace concentrations, <0.1% dry weight), and alkaloids including pyrrolizidine alkaloids (present at low but toxicologically relevant concentrations, estimated <0.1% dry weight — safety concern with prolonged use). Volatile essential oils contribute approximately 0.1-0.2% dry weight including thymol and related monoterpenes. Micronutrient content is not well characterized but dried aerial parts contain modest amounts of potassium and calcium typical of leafy plant material. Bioavailability data is largely absent for humans; sesquiterpene lactones are lipophilic and presumed to absorb via passive diffusion, while polysaccharides likely act primarily within the gastrointestinal tract with limited systemic absorption.
Boneset's polysaccharides activate macrophages through toll-like receptor pathways, enhancing immune surveillance and phagocytic activity. Sesquiterpene lactones like eupafolin and yupapin inhibit nuclear factor-kappa B (NF-κB) signaling, reducing pro-inflammatory cytokine production. The flavonoids quercetin and kaempferol provide additional antioxidant activity by scavenging reactive oxygen species.
Current evidence for boneset is limited to preliminary in vitro studies examining immune and anti-inflammatory effects. Cell culture studies have shown polysaccharide fractions can increase macrophage activation markers, but no standardized dosages or human bioavailability data exists. Traditional use spans centuries among Native American tribes for fever and respiratory conditions, but no randomized controlled trials have validated these applications. The lack of human clinical data makes therapeutic efficacy difficult to assess.
Boneset contains pyrrolizidine alkaloids that may cause hepatotoxicity with long-term use, though levels vary significantly between preparations. The herb may interact with immunosuppressive medications by potentially enhancing immune function. Pregnancy and breastfeeding safety has not been established due to limited toxicology data. Acute side effects may include gastrointestinal upset, and the plant should be avoided by individuals with liver disease.
