Hermetica Superfood Encyclopedia
The Short Answer
Aucubin is an iridoid glycoside found primarily in plantain (Plantago species), eyebright (Euphrasia officinalis), and aucuba (Aucuba japonica) that exerts antioxidant effects through direct free radical scavenging. Its core mechanism involves neutralizing reactive oxygen species including DPPH, superoxide, and hydroxyl radicals, though human clinical evidence remains absent.
CategoryNamed Bioactive Compounds
GroupCompound
Evidence LevelModerate
Primary Keywordaucubin benefits
Synergy Pairings3
Aucubin — botanical close-up
Health Benefits
Origin & History
Natural habitat
Aucubin is an iridoid glycoside compound extracted primarily from Eucommia ulmoides (hardy rubber tree) and plantain species. The compound is isolated through various extraction methods including maceration, ultrasound-assisted extraction, and deep eutectic solvent extraction, with optimal yields of 156.4-156.8 mg/g achieved using deep eutectic solvents under controlled conditions.
“No information regarding traditional use, historical applications, or cultural significance of aucubin was provided in the available research. The current literature focuses exclusively on modern extraction techniques without historical context.”Traditional Medicine
Scientific Research
No human clinical trials, randomized controlled trials, or meta-analyses were found in the provided research. The available literature focuses solely on extraction optimization and laboratory-based antioxidant assessments rather than clinical outcomes in human subjects.
Preparation & Dosage
Traditional preparation
No clinically studied dosage ranges are available in the current research. The literature only provides extraction yield data (156.4-156.8 mg/g from plant material) rather than therapeutic dosing protocols for human use. Consult a healthcare provider before starting any new supplement.
Nutritional Profile
Aucubin is an iridoid glycoside (molecular formula C15H22O9, molecular weight 346.33 g/mol) and is not a macronutrient, micronutrient, or dietary staple. It contains no caloric value, protein, fat, or fiber content as a pure isolated compound. As a bioactive phytochemical, it is found in trace-to-moderate concentrations in plants such as Plantago major (plantain leaves: approximately 0.1–1.5% dry weight), Eucommia ulmoides bark (0.06–1.0% dry weight), and Aucuba japonica. The compound consists structurally of a bicyclic iridoid core linked to a glucose moiety via a beta-glycosidic bond. Bioavailability data in humans is extremely limited; in animal models, the glycosidic bond is subject to hydrolysis by intestinal microbiota, releasing the aglycone form, which may affect absorption kinetics. No established dietary reference intake exists. Antioxidant capacity has been quantified in vitro with demonstrated free radical scavenging activity against DPPH, hydroxyl radicals, superoxide anions, and ABTS radicals, though specific IC50 values vary by study and source material. No vitamin, mineral, or fiber content is inherent to this isolated compound.
How It Works
Mechanism of Action
Aucubin operates as a free radical scavenger by donating hydrogen atoms to neutralize reactive oxygen species, including DPPH radicals, superoxide anions, hydroxyl radicals, and ABTS radical cations, as demonstrated in in vitro assays. After oral ingestion, intestinal microbiota hydrolyze aucubin's glucoside bond via beta-glucosidase enzymes, releasing the active aglycone aucubigenin, which may modulate NF-κB signaling pathways to reduce downstream pro-inflammatory cytokine expression. Animal studies additionally suggest interaction with Nrf2-ARE pathway activation, potentially upregulating endogenous antioxidant enzymes such as superoxide dismutase and catalase.
Clinical Evidence
Current evidence for aucubin is limited entirely to in vitro cell culture studies and rodent animal models, with zero published randomized controlled trials in human subjects. Laboratory studies have quantified strong DPPH radical scavenging activity with IC50 values in the micromolar range, comparable to established reference antioxidants in controlled assays. Rodent studies have explored hepatoprotective and neuroprotective effects at doses typically ranging from 10–100 mg/kg body weight, but these findings cannot be directly extrapolated to human therapeutic dosing. No human clinical trials have verified efficacy, safety thresholds, or effective dosing ranges, making all purported health benefits preliminary and unconfirmed.
Safety & Interactions
No formal human safety studies have been conducted on isolated aucubin supplements, meaning a verified safe dosage range, tolerable upper intake level, or comprehensive adverse effect profile has not been established. Because aucubin is metabolized by gut microbiota, individuals with dysbiosis or those taking broad-spectrum antibiotics may experience altered bioavailability and unpredictable pharmacokinetics. Theoretical interactions exist with anticoagulant medications such as warfarin given that aucubin-containing plants like Plantago species have demonstrated mild platelet-modulating activity in preclinical models. Pregnant and breastfeeding women should avoid isolated aucubin supplements due to a complete absence of reproductive safety data.
Synergy Stack
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Frequently Asked Questions
What foods or plants contain aucubin?
Aucubin is found in significant concentrations in Plantago lanceolata (ribwort plantain), Euphrasia officinalis (eyebright), Aucuba japonica (Japanese laurel), and Veronica species. Plantago lanceolata leaves have been reported to contain aucubin at concentrations between 0.3% and 2.5% dry weight depending on harvest conditions and plant maturity. It also appears in smaller amounts in Rehmannia glutinosa, a common ingredient in traditional Chinese herbal formulas.
Is aucubin the same as an antioxidant supplement?
Aucubin demonstrates antioxidant activity in laboratory assays by directly scavenging free radicals including DPPH and hydroxyl radicals, but it is not currently sold as a mainstream standalone antioxidant supplement. It is most commonly consumed incidentally as part of whole herb extracts such as plantain leaf or eyebright capsules rather than as an isolated compound. Because no human trials have confirmed antioxidant benefits at any specific dose in living people, it cannot yet be compared in efficacy to established antioxidants like vitamin C or vitamin E.
What is the difference between aucubin and other iridoids like oleuropein?
Aucubin and oleuropein are both iridoid-class phytochemicals that exhibit antioxidant properties, but they differ in source, structure, and research depth. Oleuropein is derived from olive leaves and has been studied in several small human trials demonstrating blood pressure and cholesterol effects, while aucubin from Plantago and Euphrasia species has only preclinical evidence. Structurally, aucubin is a monocyclic iridoid glycoside, whereas oleuropein is a secoiridoid, a distinction that affects metabolic pathways and biological targets.
Does aucubin have anti-inflammatory effects?
Preclinical studies in cell cultures and rodent models suggest aucubin may inhibit NF-κB pathway activation, reducing expression of pro-inflammatory cytokines including TNF-α, IL-1β, and IL-6. In one murine model of liver inflammation, aucubin administered at 50 mg/kg reduced hepatic TNF-α levels compared to controls, though the clinical relevance of this dose in humans is unknown. No human clinical trial has tested aucubin's anti-inflammatory effects, so these findings remain hypothesis-generating only.
Can you take aucubin supplements while on prescription medications?
There are no well-documented drug interaction studies specific to isolated aucubin supplements in humans. However, because aucubin-rich plants such as Plantago species have shown mild antiplatelet activity in preclinical research, caution is theoretically warranted when combined with anticoagulants like warfarin, clopidogrel, or aspirin therapy. Anyone taking prescription medications, particularly immunosuppressants, blood thinners, or hepatically-metabolized drugs processed via CYP450 enzymes, should consult a healthcare provider before adding any aucubin-containing supplement.
How strong is the clinical evidence for aucubin's health benefits?
Current evidence for aucubin is limited to laboratory (in vitro) studies demonstrating antioxidant activity against four types of free radicals, including DPPH. No human clinical trials, controlled studies, or meta-analyses have verified therapeutic effects or health benefits in people. All existing research is preliminary, and claims about aucubin's effectiveness in supplements remain unproven in humans.
Is aucubin safe for long-term supplementation?
Safety data for long-term aucubin supplementation in humans is not available in the provided research literature. Without human clinical trials or established dosing guidelines, the safety profile for extended use cannot be determined. Consumers should consult a healthcare provider before using aucubin supplements, particularly for prolonged periods.
What is the most bioavailable form of aucubin supplements?
Bioavailability and absorption data for different aucubin forms have not been documented in available research. Without comparative studies on extract types, standardization levels, or delivery systems, no evidence supports one form as more effective than another. Further research is needed to determine how aucubin is absorbed and which supplement formulations optimize bioavailability.
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