# Auraptene **Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/auraptene **Data Source:** Hermetica Superfoods Ingredient Encyclopedia **Updated:** 2026-03-20 **Evidence Score:** 2 / 10 **Category:** Compound **Also Known As:** (+)-auraptene, 7-geranyloxycoumarin, 7-(3,7-dimethyl-2,6-octadienyloxy)coumarin, citrus auraptene, monoterpene coumarin ether, geranyloxy coumarin ## Overview Auraptene is a naturally occurring coumarin compound found predominantly in citrus fruits, particularly in the peel of grapefruits and bitter oranges. It exerts its primary effects through inhibition of acyl-CoA:cholesterol acyltransferase (ACAT), modulation of estrogen receptors, and activation of peroxisome proliferator-activated receptors (PPARs), influencing cholesterol [metabolism](/ingredients/condition/weight-management) and hormonal signaling. ## Health Benefits • Potential to inhibit cholesterol production through ACAT inhibition (IC₅₀ of 4 μM) [5] (Preliminary evidence). • Estrogen receptor modulation, which may influence hormone-related pathways [5] (Preliminary evidence). • Acts as a PPAR agonist, potentially impacting metabolic processes [5] (Preliminary evidence). • Inhibits β-secretase activity with an IC₅₀ of 345.1 μM, relevant to Alzheimer's research [2] (Preliminary evidence). • Induces apoptosis and anti-proliferative effects in cancer cell lines [5] (Preliminary evidence). ## Mechanism of Action Auraptene inhibits acyl-CoA:cholesterol acyltransferase (ACAT) with an IC₅₀ of approximately 4 μM, reducing intracellular cholesterol esterification and potentially lowering cholesterol synthesis in hepatic and intestinal cells. It acts as a PPAR agonist, engaging both PPARα and PPARγ subtypes to influence lipid [metabolism](/ingredients/condition/weight-management), fatty acid oxidation, and glucose homeostasis at the transcriptional level. Additionally, auraptene modulates estrogen receptor activity, suggesting a phytoestrogenic mechanism that may affect hormone-sensitive tissues and downstream signaling cascades including those governed by [NF-κB](/ingredients/condition/inflammation) and Nrf2. ## Clinical Summary The majority of evidence supporting auraptene's health effects derives from in vitro cell culture studies and rodent models, with no large-scale human clinical trials published to date. Animal studies have demonstrated [anti-inflammatory](/ingredients/condition/inflammation), anti-tumor, and lipid-modulating effects at doses ranging from approximately 10 to 100 mg/kg body weight, though direct translation to human dosing remains speculative. In vitro ACAT inhibition studies report an IC₅₀ of 4 μM, suggesting meaningful potency, but bioavailability and pharmacokinetics in humans are not well characterized. Overall, the evidence is classified as preliminary, and human trials are needed before therapeutic claims can be substantiated. ## Nutritional Profile Auraptene is a pure bioactive compound (a prenylated coumarin, specifically 7-geranyloxycoumarin), not a whole food or nutritional source, so it does not contain macronutrients, vitamins, minerals, fiber, or protein in any meaningful sense. It is a single small-molecule phytochemical with a molecular weight of 312.4 g/mol and molecular formula C₂₀H₂₄O₃. Naturally occurring concentrations: found in citrus peel oils and juices at approximately 0.01–0.5 mg/g dry weight in citrus rinds (e.g., yuzu, grapefruit, lemon), with highest reported concentrations in bergamot and Japanese citrus varieties. As an isolated compound, it is 100% a single bioactive molecule with no caloric, protein, fat, or carbohydrate content. Bioavailability: Auraptene is lipophilic (logP approximately 4.5), suggesting moderate-to-good intestinal absorption when consumed with dietary fat; it undergoes hepatic first-pass [metabolism](/ingredients/condition/weight-management) and has demonstrated oral bioavailability in rodent models, with peak plasma concentrations reached within 1–2 hours post-administration. It is metabolized via cytochrome P450 enzymes (notably CYP3A4) and conjugated for urinary/biliary excretion. No established dietary reference intake or recommended dose exists for humans. ## Dosage & Preparation No clinically studied dosage ranges for human use are available in the provided search results. Consult a healthcare provider before starting any new supplement. ## Safety & Drug Interactions Auraptene has not been formally evaluated for safety in human clinical trials, so a comprehensive side effect profile has not been established. Due to its estrogen receptor modulating activity, individuals with hormone-sensitive conditions such as estrogen receptor-positive breast cancer, uterine fibroids, or endometriosis should exercise caution and consult a healthcare provider before use. Because auraptene is derived from citrus sources closely related to grapefruit, there is a theoretical risk of interactions with CYP3A4-metabolized drugs, as grapefruit compounds are well-documented CYP3A4 inhibitors, though this has not been specifically confirmed for auraptene. Pregnant and breastfeeding women should avoid supplemental auraptene due to the absence of safety data and its hormonal activity. ## Scientific Research The search results did not contain specific human clinical trials or meta-analyses with PubMed PMIDs. Most data available are from in vitro and animal studies. ## Historical & Cultural Context The search results do not provide information about auraptene's historical use in traditional medicine systems. Additional research would be needed to document any cultural context or traditional use. ## Synergistic Combinations Vitamin C, Turmeric, Resveratrol, Omega-3, Quercetin ## Frequently Asked Questions ### What foods contain auraptene naturally? Auraptene is found primarily in citrus fruits, with the highest concentrations detected in the peel and essential oils of grapefruits, bitter oranges (Citrus aurantium), and yuzu. The flesh of these fruits contains significantly lower levels compared to the peel, and most dietary exposure occurs from consuming citrus zest, cold-pressed citrus oils, or whole citrus preparations. ### How does auraptene inhibit cholesterol production? Auraptene inhibits acyl-CoA:cholesterol acyltransferase (ACAT), an enzyme responsible for esterifying free cholesterol into cholesterol esters stored within cells, with an IC₅₀ of approximately 4 μM in laboratory assays. By blocking ACAT activity, auraptene may reduce cholesterol ester accumulation in arterial macrophages and hepatocytes, potentially limiting foam cell formation associated with atherosclerosis. This mechanism is distinct from statins, which target HMG-CoA reductase earlier in the cholesterol biosynthesis pathway. ### Is auraptene a phytoestrogen? Auraptene demonstrates estrogen receptor modulating activity in preliminary in vitro studies, classifying it as a putative phytoestrogen, though its estrogenic potency is considerably lower than compounds like genistein or daidzein from soy. Its interaction with estrogen receptors suggests it could influence hormone-sensitive pathways, but whether it acts as an agonist or antagonist likely depends on tissue type and endogenous estrogen levels. Human data confirming phytoestrogenic effects in vivo are currently lacking. ### What is the studied dosage of auraptene in research? Animal studies have used auraptene doses ranging from approximately 10 to 100 mg/kg body weight to observe anti-inflammatory, lipid-modulating, and anti-tumor effects in rodent models. No established human dosage exists, as clinical trials in humans have not been conducted to determine effective or safe dosing ranges. Extrapolating animal doses to humans requires allometric scaling and consideration of bioavailability data that are not yet available for auraptene. ### Can auraptene interact with prescription medications? Because auraptene is structurally related to furanocoumarins found in grapefruit, which are potent CYP3A4 inhibitors, there is a theoretical concern that auraptene supplementation could interfere with the metabolism of drugs processed by the CYP3A4 enzyme, including certain statins, calcium channel blockers, immunosuppressants, and benzodiazepines. This interaction has not been directly confirmed for auraptene in human pharmacokinetic studies, so it remains a precautionary consideration rather than a documented drug interaction. Anyone taking CYP3A4-sensitive medications should consult their physician or pharmacist before using auraptene-containing supplements. ### What is the evidence quality for auraptene's effects on cholesterol and metabolic health? Current evidence for auraptene's cholesterol-lowering effects is preliminary, based primarily on in vitro studies showing ACAT inhibition at an IC₅₀ of 4 μM. While these laboratory findings are promising, human clinical trials are limited, meaning efficacy and safety in real-world supplementation remain largely unconfirmed. More robust clinical research is needed before auraptene can be considered a proven therapeutic agent for metabolic disorders. ### Who should consider auraptene supplementation based on current research? Auraptene may be of interest to individuals exploring natural compounds for cholesterol management or metabolic support, though evidence remains preliminary. Those interested in phytonutrients with PPAR-agonist activity or potential neuroprotective properties (via β-secretase inhibition) may find auraptene worthy of consideration. However, without robust human trials, auraptene is not yet recommended as a primary intervention for any specific health condition. ### How does auraptene's mechanism of action differ from common cholesterol-lowering supplements? Unlike statins or common supplements like plant sterols, auraptene works through ACAT (acyl-CoA:cholesterol acyltransferase) inhibition rather than blocking HMG-CoA reductase or LDL absorption. Additionally, auraptene demonstrates estrogen receptor modulation and PPAR-agonist activity, suggesting multi-pathway metabolic effects that conventional cholesterol supplements typically do not possess. This unique mechanistic profile makes auraptene biochemically distinct, though its clinical relevance compared to established interventions remains unproven. --- *Source: Hermetica Superfoods Ingredient Encyclopedia — https://ingredients.hermeticasuperfoods.com* *License: CC BY-NC-SA 4.0 — Attribution required. Commercial use: admin@hermeticasuperfoods.com*