# Isoxanthohumol **Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/isoxanthohumol **Data Source:** Hermetica Superfoods Ingredient Encyclopedia **Updated:** 2026-03-20 **Evidence Score:** 2 / 10 **Category:** Compound **Also Known As:** IX, IXN, Isoxanthohumol, 4',7-dihydroxy-6-methoxy-3-(3-methyl-2-buten-1-yl)flavanone, Hop flavonoid IX, Prenylated flavanone from hops, Beer hop compound ## Overview Isoxanthohumol is a prenylated flavanone found in hops that functions as a phytoestrogen and [antioxidant](/ingredients/condition/antioxidant) compound. This bioactive molecule demonstrates potential anti-diabetic, anti-cancer, and [neuroprotective effect](/ingredients/condition/cognitive)s through modulation of estrogen receptors and cellular signaling pathways. ## Health Benefits • Potential anti-diabetic effects studied in vitro and in rat models. • Investigated for anti-carcinogenic properties, though human trials are lacking. • Exhibits [antioxidant](/ingredients/condition/antioxidant) capabilities in preclinical studies. • Shows potential anti-HIV activity in laboratory settings. • Conversion to 8-prenylnaringenin, a potent phytoestrogen, may offer additional health benefits. ## Mechanism of Action Isoxanthohumol acts as a selective estrogen receptor modulator (SERM), binding to both ERα and ERβ receptors with preferential affinity for ERβ. The compound inhibits aromatase enzyme activity, reducing estrogen synthesis, while simultaneously activating [antioxidant](/ingredients/condition/antioxidant) pathways through Nrf2 signaling. Its prenyl side chain enhances membrane permeability and allows interaction with cytochrome P450 enzymes involved in xenobiotic [metabolism](/ingredients/condition/weight-management). ## Clinical Summary Human clinical data for isoxanthohumol remains extremely limited, with most evidence derived from in vitro cell culture and animal studies. Rat studies using 10-50 mg/kg doses showed improved glucose tolerance and reduced tumor formation over 8-12 week periods. Laboratory studies demonstrate IC50 values of 15-30 μM for various cancer cell lines and [antioxidant](/ingredients/condition/antioxidant) capacity equivalent to 0.8-1.2 times that of vitamin E. The lack of human trials severely limits conclusions about therapeutic efficacy and optimal dosing in humans. ## Nutritional Profile Isoxanthohumol is a prenylated flavanone (chemical formula C₂₁H₂₂O₅; molecular weight ~354.4 g/mol) and is not a food or nutrient per se, so it lacks a conventional macronutrient profile (no protein, fat, carbohydrate, or fiber content in nutritional terms). It is a bioactive polyphenolic compound found primarily in hops (Humulus lupulus) and is the most abundant prenylated flavonoid in beer, typically present at concentrations of approximately 0.04–3.44 mg/L in commercial beers, depending on beer style and brewing process (higher in ales and heavily hopped craft beers). In raw hop cones and hop pellets, concentrations can range from roughly 100–800 µg/g dry weight. Key bioactive characteristics: • Prenylated flavanone backbone with a prenyl group at C-5', conferring enhanced membrane interaction and bioactivity relative to non-prenylated flavonoids. • Serves as the principal dietary precursor to 8-prenylnaringenin (8-PN), the most potent known phytoestrogen, via O-demethylation catalyzed by gut microbiota (particularly Eubacterium limosum) and hepatic CYP1A2 enzymes; conversion rates are highly variable among individuals (estimated 0–36% depending on [gut microbiome](/ingredients/condition/gut-health) composition). • Exhibits intrinsic [antioxidant activity](/ingredients/condition/antioxidant) with reported ORAC values and free-radical scavenging capacity, though less potent than its parent compound xanthohumol. • No vitamins or minerals are inherent to the isolated compound. • Bioavailability: Oral bioavailability is considered low-to-moderate; it undergoes extensive first-pass hepatic [metabolism](/ingredients/condition/weight-management) (glucuronidation and sulfation via UGT and SULT enzymes). Plasma concentrations after beer consumption are typically in the low nanomolar range (estimated Cmax ~10–50 nM after moderate beer intake). Enterohepatic recirculation may prolong systemic exposure. Lipophilicity (LogP ~3.5) aids intestinal absorption but also promotes rapid conjugation. The compound is not an essential nutrient and has no established Recommended Daily Intake (RDI) or Adequate Intake (AI) value. ## Dosage & Preparation No clinically studied dosage ranges or forms have been reported due to the absence of human trials. Consult a healthcare provider before starting any new supplement. ## Safety & Drug Interactions Safety data for isoxanthohumol supplementation in humans is insufficient due to lack of clinical trials. As a phytoestrogen, it may interact with hormone-sensitive medications including birth control pills, hormone replacement therapy, and tamoxifen. Potential concerns exist for individuals with estrogen-dependent cancers or those taking aromatase inhibitors. Pregnancy and lactation safety has not been established, and the compound's interaction with cytochrome P450 enzymes suggests possible drug [metabolism](/ingredients/condition/weight-management) interference. ## Scientific Research No human clinical trials or meta-analyses specifically on isoxanthohumol were identified. Research is limited to preclinical studies involving in vitro and animal models. ## Historical & Cultural Context Isoxanthohumol does not have known historical or traditional uses. It is mainly recognized in modern contexts from hops without associations to traditional medicinal systems. ## Synergistic Combinations Xanthohumol, 8-Prenylnaringenin, Resveratrol, Quercetin, EGCG ## Frequently Asked Questions ### What foods contain isoxanthohumol naturally? Isoxanthohumol is found primarily in hops (Humulus lupulus), with concentrations ranging from 0.1-2.0 mg/g in hop cones. Beer contains trace amounts (0.1-1.0 mg/L) depending on hop variety and brewing process. Small amounts may also be present in other plants of the Cannabaceae family. ### How much isoxanthohumol is safe to take daily? No established safe dosage exists for isoxanthohumol supplements due to lack of human clinical trials. Animal studies used equivalent doses of 10-50 mg/kg body weight, which would translate to approximately 700-3500 mg daily for a 70 kg adult, but human safety at these levels is unknown. ### Does isoxanthohumol convert to other compounds in the body? Yes, gut bacteria can convert isoxanthohumol to 8-prenylnaringenin, a more potent phytoestrogen with 50-100 times greater estrogenic activity. This conversion varies significantly between individuals based on gut microbiome composition, with only 30-60% of people showing detectable conversion rates. ### Can isoxanthohumol help with menopause symptoms? While isoxanthohumol's phytoestrogenic properties suggest potential benefits for menopause symptoms, no human clinical trials have tested this application. Its weaker estrogenic activity compared to its metabolite 8-prenylnaringenin may limit effectiveness, and safety concerns exist for hormone-sensitive individuals. ### What is the difference between isoxanthohumol and xanthohumol? Isoxanthohumol is a prenylated flavanone that acts as a phytoestrogen, while xanthohumol is a prenylated chalcone with stronger anti-cancer properties but no estrogenic activity. Both are found in hops, but xanthohumol is more abundant (2-10 mg/g vs 0.1-2.0 mg/g) and has been more extensively studied in human trials. ### What does research show about isoxanthohumol's anti-diabetic potential? Preclinical studies in cell cultures and animal models have demonstrated that isoxanthohumol may help regulate blood glucose levels and improve insulin sensitivity, though these findings have not yet been validated in human clinical trials. The proposed mechanisms involve antioxidant activity and potential effects on glucose metabolism pathways. Current evidence is promising but limited, and more human research is needed before definitive claims can be made about its anti-diabetic efficacy. ### Is isoxanthohumol safe to take with diabetes or blood pressure medications? While isoxanthohumol has not been extensively studied for drug interactions in humans, its potential anti-diabetic and antioxidant effects suggest it could theoretically interact with diabetes or cardiovascular medications. Anyone taking prescription medications, particularly those that affect blood glucose or blood pressure, should consult a healthcare provider before supplementing with isoxanthohumol to avoid potential additive effects or contraindications. Current clinical data on specific drug interactions is limited. ### How strong is the evidence for isoxanthohumol's anti-carcinogenic effects in humans? Laboratory and animal studies have shown that isoxanthohumol exhibits anti-carcinogenic properties through antioxidant mechanisms and potential effects on cancer cell growth, but human clinical trials testing these effects are currently lacking. Any anti-cancer claims for isoxanthohumol remain theoretical and should not be considered as a substitute for conventional cancer treatment. Further human research is essential to determine whether these promising preclinical findings translate to clinical benefit. --- *Source: Hermetica Superfoods Ingredient Encyclopedia — https://ingredients.hermeticasuperfoods.com* *License: CC BY-NC-SA 4.0 — Attribution required. Commercial use: admin@hermeticasuperfoods.com*