Hermetica Superfood Encyclopedia
The Short Answer
Esculetin is a dihydroxycoumarin compound found in plants like chicory and barley that exhibits potent antioxidant activity through free radical scavenging and metal chelation. Research demonstrates its ability to enhance antioxidant enzymes like catalase and superoxide dismutase while inhibiting cancer cell growth through JNK and ERK pathway modulation.
CategoryNamed Bioactive Compounds
GroupCompound
Evidence LevelModerate
Primary Keywordesculetin benefits
Synergy Pairings3
Esculetin (Coumarin) — botanical close-up
Health Benefits
Origin & History
Natural habitat
Esculetin (6,7-dihydroxycoumarin) is a natural coumarin derivative primarily extracted from the twig skin and trunk bark of Fraxinus rhynchophylla Hance, a Chinese herbal medicine. It is also found enriched in plants including Sonchus grandifolius and Aesculus turbinata, characterized by two hydroxyl groups at the 6th and 7th carbon positions.
“Esculetin is derived from Fraxinus rhynchophylla Hance, a traditional Chinese herbal medicine. Specific historical applications and duration of traditional use are not detailed in the available research.”Traditional Medicine
Scientific Research
The available research consists primarily of in vitro studies and animal models, with no human clinical trials or meta-analyses provided in the research dossier. Animal studies utilized 100-500 mg/kg doses for antioxidant effects, while cellular studies employed 5-30 µg/mL concentrations.
Preparation & Dosage
Traditional preparation
Animal studies have used 100-500 mg/kg body weight for hepatoprotective and antioxidant effects. In vitro studies employed 5-30 µg/mL concentrations. No standardized human dosage has been established due to lack of clinical trials. Consult a healthcare provider before starting any new supplement.
Nutritional Profile
Esculetin (6,7-dihydroxycoumarin) is a pure bioactive coumarin compound, not a whole food ingredient, and therefore contains no macronutrients (protein, fat, carbohydrates), dietary fiber, vitamins, or minerals in any meaningful nutritional sense. As an isolated phytochemical with molecular weight of 178.14 g/mol, its profile is defined entirely by its bioactive coumarin structure. Key bioactive characteristics: belongs to the benzopyrone class of polyphenolic compounds; contains a catechol moiety (adjacent hydroxyl groups at C-6 and C-7 positions) critical for its antioxidant and metal-chelating activity. Naturally occurs in trace amounts in plant sources including chicory (Cichorium intybus), California buckeye bark, and various Euphorbia species, typically at concentrations of 0.01–0.5% dry weight depending on plant part. Bioavailability data is limited but studies indicate moderate oral absorption in rodent models; the catechol structure allows iron and copper chelation (log stability constants estimated at ~8–10 for Fe³⁺), enhancing its functional antioxidant capacity beyond simple radical scavenging. Lipophilicity (logP ~1.4) suggests moderate membrane permeability. No established dietary reference intake exists as it is not classified as an essential nutrient. Research doses in animal studies range from 100–500 mg/kg body weight; in vitro effective concentrations reported at 30–100 µg/mL. Metabolized primarily via glucuronidation and sulfation in the liver.
How It Works
Mechanism of Action
Esculetin functions as a potent antioxidant by directly scavenging free radicals and chelating metal ions that catalyze oxidative reactions. The compound enhances cellular antioxidant defense by upregulating key enzymes including catalase and superoxide dismutase. In cancer cells, esculetin demonstrates anti-proliferative effects by downregulating the c-Jun N-terminal kinase (JNK) and extracellular signal-regulated kinase (ERK) signaling pathways.
Clinical Evidence
Current research on esculetin is primarily limited to in vitro and animal studies, with no completed human clinical trials. Animal studies using 100-500 mg/kg doses showed significant improvements in antioxidant enzyme levels including catalase and superoxide dismutase. In vitro cancer research demonstrated anti-leukemic activity at 30 µg/mL concentrations through JNK and ERK pathway inhibition. The evidence base remains preliminary and requires human clinical validation to establish therapeutic efficacy and optimal dosing.
Safety & Interactions
Safety data for esculetin supplementation in humans is limited due to lack of clinical trials. As a coumarin derivative, esculetin may theoretically interact with anticoagulant medications like warfarin, though specific interactions have not been documented. Animal studies at therapeutic doses showed no acute toxicity, but long-term safety remains unknown. Pregnant and breastfeeding women should avoid esculetin supplements due to insufficient safety data.
Synergy Stack
Hermetica Formulation Heuristic
Also Known As
6,7-dihydroxycoumarin6,7-dihydroxy-2H-chromen-2-oneAesculin aglyconeCichoriin aglyconeFraxinus coumarinQin Pi extractChinese ash bark compound
Frequently Asked Questions
What foods contain esculetin naturally?
Esculetin is naturally found in chicory root, barley, lettuce, and various citrus fruits. Chicory root contains the highest concentrations, with esculetin also present in traditional herbal medicines like fraxinus bark.
How much esculetin should I take daily?
No established human dosage exists for esculetin supplements since clinical trials have not been conducted. Animal studies used 100-500 mg/kg doses, but human equivalent doses cannot be reliably determined without clinical data.
Can esculetin help prevent cancer?
Laboratory studies show esculetin inhibits leukemia cell growth at 30 µg/mL by blocking JNK and ERK pathways. However, these are preliminary in vitro results that have not been validated in human cancer prevention or treatment studies.
Does esculetin interact with blood thinners?
While specific interactions haven't been documented, esculetin's coumarin structure theoretically suggests potential interactions with anticoagulants like warfarin. Consult your healthcare provider before combining esculetin with blood-thinning medications.
What's the difference between esculetin and other coumarins?
Esculetin is a dihydroxycoumarin with two hydroxyl groups that enhance its antioxidant activity compared to simple coumarins. Unlike warfarin, esculetin shows anti-cancer properties through JNK/ERK pathway inhibition rather than anticoagulant effects.
What does the current clinical research show about esculetin's effectiveness in humans?
Most evidence for esculetin comes from animal and laboratory studies, with limited human clinical trials to date. Animal studies at 100–500 mg/kg doses demonstrated improvements in antioxidant enzymes like catalase and superoxide dismutase, while in vitro research showed anti-cancer and anti-inflammatory effects. Human efficacy and optimal dosing remain poorly established, making it premature to claim proven health benefits in people based on current research quality.
Is esculetin safe for people with liver disease or taking hepatotoxic medications?
As a coumarin compound, esculetin undergoes hepatic metabolism and may present safety concerns for individuals with compromised liver function, though specific human safety data is limited. People taking medications that are hepatotoxic or heavily metabolized by the liver should consult a healthcare provider before supplementing with esculetin. Additionally, esculetin's potential effects on liver enzyme activity warrant caution in those with pre-existing liver disease.
How does esculetin's bioavailability compare to synthetic vs. naturally-derived forms?
Bioavailability data specifically comparing synthetic esculetin to naturally-derived sources from plants like horse chestnut is not well-documented in published literature. Esculetin is typically obtained as an isolated compound from natural sources or synthesized in laboratories, but absorption rates and metabolic differences between these forms have not been systematically studied in humans. Factors such as food presence, individual gut microbiota, and formulation type likely influence absorption, but controlled human studies are needed to establish comparative bioavailability.
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