# Calycosin **Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/calycosin **Data Source:** Hermetica Superfoods Ingredient Encyclopedia **Updated:** 2026-03-27 **Evidence Score:** 4 / 10 **Category:** Compound **Also Known As:** 7-hydroxy-3'-(4-methoxyphenyl)-4H-chromen-4-one, Astragalus isoflavone, Huang qi isoflavone, 3',7-dihydroxy-4'-methoxyisoflavone, Calycosin-7-glucoside precursor, Astragali Radix isoflavone ## Overview Calycosin is an isoflavone compound primarily found in Astragalus membranaceus that exhibits [immunomodulatory](/ingredients/condition/immune-support) properties through T cell regulation. Research indicates it may support immune function by suppressing pathogenic T follicular helper cells and reducing autoantibody production. ## Health Benefits • May support [immune function](/ingredients/condition/immune-support) by suppressing pathogenic T follicular helper cells and reducing autoantibody production (preliminary evidence from cell studies and one human validation study, PMID: 40181166) • Potential [neuroprotective effect](/ingredients/condition/cognitive)s against Parkinson's disease by inhibiting TLR/NF-κB and MAPK pathways (animal studies only) • May help maintain healthy skin barrier function by reducing [inflammatory](/ingredients/condition/inflammation) cytokines and restoring tight junction proteins (preclinical evidence) • Shows anti-cancer properties in multiple cell line studies including pancreatic, colorectal, and lung cancers (in vitro evidence only) • Demonstrates [antioxidant activity](/ingredients/condition/antioxidant) through activation of the Nrf2 pathway (cell culture studies) ## Mechanism of Action Calycosin modulates [immune function](/ingredients/condition/immune-support) by suppressing pathogenic T follicular helper cells and reducing autoantibody production through unknown molecular pathways. It demonstrates [neuroprotective effect](/ingredients/condition/cognitive)s by inhibiting TLR/NF-κB signaling cascades, which reduces [inflammatory](/ingredients/condition/inflammation) responses in neural tissue. The compound's isoflavone structure allows it to interact with various cellular receptors and inflammatory mediators. ## Clinical Summary Evidence for calycosin primarily comes from cell culture studies and limited human research. One human validation study (PMID: 40181166) demonstrated immune-modulating effects through T follicular helper cell suppression, though sample size and study duration are not specified in available data. Most research remains in preliminary stages with cell-based studies showing [neuroprotective](/ingredients/condition/cognitive) potential against Parkinson's disease. Additional human clinical trials are needed to establish therapeutic dosages and confirm efficacy in larger populations. ## Nutritional Profile Calycosin is a pure bioactive isoflavonoid compound (molecular formula: C16H12O5, molecular weight: 284.27 g/mol), not a whole food ingredient, therefore it contains no macronutrients (zero protein, fat, carbohydrate, or fiber), no vitamins, and no minerals in its isolated form. It is a 3'-hydroxy-formononetin, classified as a phytoestrogenic isoflavone predominantly extracted from Astragalus membranaceus (Huangqi) root, where it occurs at concentrations of approximately 0.01–0.05% dry weight of the raw herb. As a pure compound, its 'nutritional profile' is defined entirely by its bioactive properties: it exhibits selective estrogen receptor modulator (SERM)-like activity with binding affinity for ERβ over ERα. Bioavailability data from animal studies suggests moderate oral absorption with hepatic first-pass [metabolism](/ingredients/condition/weight-management) converting it to glucuronide and sulfate conjugates; peak plasma concentrations (Cmax) in rodent models range approximately 50–200 ng/mL following doses of 20–50 mg/kg. In standardized Astragalus extracts, calycosin-7-O-β-D-glucoside (the glycoside form) is more abundant than the aglycone and requires intestinal hydrolysis for activation. Lipophilicity (logP ≈ 2.1) suggests moderate membrane permeability. No dietary reference intake or recommended daily allowance exists for this compound. ## Dosage & Preparation Preclinical dosage ranges studied in animal models include 25-50 mg/kg for cancer models and 0-100 μM for in vitro studies. No established clinically validated dosage for human use has been determined, and standardized extract formulations with defined calycosin concentrations are not well-characterized in the literature. Consult a healthcare provider before starting any new supplement. ## Safety & Drug Interactions Safety data for calycosin supplementation in humans is limited due to minimal clinical research. As an isoflavone compound, it may interact with hormone-sensitive conditions or medications affecting estrogen [metabolism](/ingredients/condition/weight-management). Potential interactions with immunosuppressive drugs should be considered given its T cell modulating effects. Pregnant and nursing women should avoid calycosin supplements due to insufficient safety data and potential hormonal activity. ## Scientific Research Current clinical evidence for calycosin is limited primarily to preclinical studies, with only one study validating [immunomodulatory](/ingredients/condition/immune-support) findings in human peripheral blood mononuclear cells from patients with Sjögren's disease (PMID: 40181166). A 2025 review (PMID: 33346681) explicitly noted that clinical research trials are needed to establish suitable medicinal concentrations for different diseases and validate findings in human subjects. ## Historical & Cultural Context Calycosin is derived from Astragalus membranaceus, a cornerstone herb in Traditional Chinese Medicine used for over 2,000 years to strengthen [immune function](/ingredients/condition/immune-support), support energy (qi), and promote wound healing. While the plant has extensive traditional use, specific historical documentation of calycosin as an isolated compound predates modern extraction techniques. ## Synergistic Combinations Methotrexate (for autoimmune conditions), Astragalus whole extract, [Antioxidant](/ingredients/condition/antioxidant) compounds, Nrf2 activators ## Frequently Asked Questions ### What foods contain calycosin naturally? Calycosin is primarily found in Astragalus membranaceus (Huang Qi) root, a traditional Chinese medicinal herb. It also occurs in smaller amounts in other legume family plants and some soy-derived products. ### How much calycosin should I take daily? No established dosage exists for calycosin due to limited human studies. Research has primarily used cell culture models, and the one human study did not specify dosing protocols. ### Can calycosin help with autoimmune conditions? Preliminary research suggests calycosin may reduce autoantibody production and suppress pathogenic T follicular helper cells. However, human clinical evidence is extremely limited and more research is needed before therapeutic recommendations. ### Does calycosin interact with blood pressure medications? Specific interactions with blood pressure medications have not been studied. Given calycosin's immune-modulating properties, consult a healthcare provider before combining with any prescription medications. ### Is calycosin the same as other isoflavones like genistein? Calycosin is structurally distinct from genistein and other common isoflavones, with unique hydroxyl group positioning. While sharing the basic isoflavone backbone, calycosin demonstrates different biological activities and potency profiles. ### What does research show about calycosin's effectiveness for immune support? Current evidence for calycosin's immune benefits comes primarily from cell culture studies and animal models, with limited human validation. A recent human study (2024) demonstrated that calycosin may suppress pathogenic T follicular helper cells and reduce autoantibody production, suggesting potential immune-modulating effects. However, more large-scale clinical trials are needed to establish efficacy and optimal dosing in human populations. The research quality is considered preliminary, and results cannot yet be extrapolated to disease treatment without further investigation. ### Who should avoid calycosin supplementation? Pregnant and breastfeeding women should avoid calycosin due to limited safety data in these populations and its potential estrogenic activity as an isoflavone. Individuals with hormone-sensitive conditions (such as estrogen-dependent breast cancer) should consult a healthcare provider before use, as calycosin may have weak estrogenic effects. Those with active autoimmune conditions should seek medical guidance before supplementing, as immune modulation could theoretically exacerbate certain conditions. People taking immunosuppressant medications should also discuss calycosin use with their healthcare provider. ### What is the difference between calycosin's effects on immunity versus its neuroprotective potential? Calycosin's immune benefits appear to work through suppression of T follicular helper cells and reduction of harmful autoantibodies, with preliminary human evidence supporting this mechanism. Its neuroprotective potential against Parkinson's disease operates through different pathways—specifically inhibition of TLR/NF-κB and MAPK inflammatory signaling in nerve tissue—but this effect has only been demonstrated in animal studies with no human validation. While both mechanisms involve reducing inflammation, the immune effects show more advanced research progression with human data, whereas neuroprotection remains theoretical. These distinct biological targets suggest calycosin may have multiple health applications, though evidence strength differs significantly between them. --- *Source: Hermetica Superfoods Ingredient Encyclopedia — https://ingredients.hermeticasuperfoods.com* *License: CC BY-NC-SA 4.0 — Attribution required. Commercial use: admin@hermeticasuperfoods.com*