# Glycitein

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/glycitein
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-03-19
**Evidence Score:** 8 / 10
**Category:** Compound
**Also Known As:** 7-(beta-D-glucopyranosyloxy)-6-methoxy-3-(4-hydroxyphenyl)-4H-1-benzopyran-4-one, 6-methoxy-7-glucosylgenistein, 6-methoxyisoflavone, soy isoflavone glycitein, glycitin aglycone, 6-methoxygenistein

## Overview

Glycitein is an isoflavone phytoestrogen found in soybeans that functions as a selective estrogen receptor modulator with anti-cancer properties. It works primarily through estrogen receptor binding and inhibition of protein kinases involved in cell proliferation pathways.

## Health Benefits

• May help inhibit cancer cell growth - preclinical studies show anti-proliferative effects on breast carcinoma cells (cytotoxic at 100 μg/mL) and potential colon cancer targeting through multiple pathways (preliminary evidence only)
• Could support [cardiovascular health](/ingredients/condition/heart-health) - demonstrated inhibition of aortic smooth muscle cell proliferation at 0.1-30 μmol/L in laboratory studies (preliminary evidence only)
• Provides [antioxidant activity](/ingredients/condition/antioxidant) - acts through ROS scavenging and Nrf2-ARE pathways (mechanism studies only)
• May offer weak estrogenic effects - shows 150% uterine weight increase in rodents, though less potent than genistein or estradiol (animal studies only)
• Potential [anti-inflammatory](/ingredients/condition/inflammation) properties - targets NF-κB, MAPK, and PTGS2 pathways in molecular docking studies (computational evidence only)

## Mechanism of Action

Glycitein acts as a selective estrogen receptor modulator (SERM), binding to both ERα and ERβ receptors with varying affinities. It inhibits protein kinase C and tyrosine kinases involved in cell signaling cascades. The compound also modulates [NF-κB](/ingredients/condition/inflammation) pathways and induces apoptosis through caspase activation in cancer cells.

## Clinical Summary

Preclinical studies demonstrate glycitein's cytotoxic effects on breast carcinoma cells at 100 μg/mL concentrations. In vitro research shows anti-proliferative activity against colon cancer cells through multiple molecular pathways. Animal studies suggest [cardiovascular](/ingredients/condition/heart-health) protective effects through lipid [metabolism](/ingredients/condition/weight-management) modulation. However, human clinical trials are limited, and most evidence remains at the laboratory stage with unclear therapeutic dosing.

## Nutritional Profile

Glycitein is a minor soy isoflavone (phytoestrogen) belonging to the flavonoid subclass, constituting approximately 5-10% of total soy isoflavone content compared to genistein and daidzein which dominate. It is not a macronutrient or micronutrient itself but a bioactive polyphenolic compound. Molecular weight: 284.26 g/mol. Chemical structure: 7-hydroxy-6-methoxy-3-(4-hydroxyphenyl)-4H-chromen-4-one, distinguished from other soy isoflavones by a methoxy group at the C-6 position. Found in soy-based foods at concentrations of approximately 0.5-1.5 mg per 100g in whole soybeans, and up to 2-4 mg per 100g in some soy protein isolates. Present in three forms: aglycone (glycitein), glucoside conjugate (glycitin), and malonyl glucoside (6''-O-malonylglycitin). Bioavailability is moderate; intestinal microbiota hydrolyze glucoside forms to the active aglycone prior to absorption. Peak plasma concentrations typically reached within 4-8 hours post-ingestion. Demonstrates weak estrogenic activity (estimated 0.281% relative binding affinity compared to estradiol at ERα). No meaningful macro-, vitamin, mineral, or fiber content as it is a pure isolated phytochemical compound when studied.

## Dosage & Preparation

No clinically studied dosage ranges for glycitein alone have been established. In the single human trial, glycitein was part of a soy isoflavone mixture delivering 300-600 mg genistein equivalents/day for 84 days. In vitro studies used 100 μg/mL for cytotoxic effects and 0.1-30 μmol/L for growth inhibition. Consult a healthcare provider before starting any new supplement.

## Safety & Drug Interactions

Glycitein appears generally well-tolerated as part of soy food consumption in healthy adults. Potential interactions may occur with hormone-sensitive medications due to its estrogenic activity. Women with hormone-dependent cancers should exercise caution given its SERM properties. Safety during pregnancy and lactation has not been established through dedicated studies.

## Scientific Research

Clinical evidence for glycitein alone is extremely limited. The only human trial identified was a phase I study (n=20 men with prostate cancer, n=6 controls) testing a soy isoflavone mixture containing glycitein at 300-600 mg genistein equivalents/day for 84 days, which showed no genotoxicity. Most evidence comes from preclinical cell culture and computational modeling studies.

## Historical & Cultural Context

No historical or traditional medicine uses specific to glycitein were identified in the research. It occurs naturally as part of total soy isoflavone intake in traditional Asian diets but lacks documented traditional applications as an isolated compound.

## Synergistic Combinations

Genistein, Daidzein, Curcumin, Resveratrol, EGCG

## Frequently Asked Questions

### Does glycitein have anti-cancer properties?

Preclinical studies suggest glycitein may have anti-proliferative effects against certain cancer cells. Laboratory research has demonstrated cytotoxic activity against breast carcinoma cells at 100 μg/mL, and molecular studies indicate potential colon cancer targeting through multiple pathways. Its mechanisms include caspase-mediated apoptosis induction and inhibition of tyrosine kinases involved in cell proliferation signaling. However, all current evidence comes from cell culture and computational studies — no clinical trials have tested glycitein alone for cancer, so these findings cannot yet be applied to humans.

### What is the recommended dosage of glycitein?

No clinically established dosage exists for glycitein as a standalone supplement. The only identified human trial used a mixed soy isoflavone formula delivering 300–600 mg genistein equivalents daily for 84 days, which included glycitein alongside other isoflavones. In vitro cytotoxic effects were observed at 100 μg/mL, while cardiovascular-related growth inhibition occurred at 0.1–30 μmol/L in lab settings. These concentrations cannot be directly translated into supplement dosing recommendations. Consult a qualified healthcare provider before using any glycitein-containing product.

### Is glycitein safe for men with prostate cancer?

The only human clinical trial involving glycitein included 20 men with prostate cancer and tested a soy isoflavone mixture containing glycitein at 300–600 mg genistein equivalents per day for 84 days. The study reported no evidence of genotoxicity, suggesting short-term safety within this mixed isoflavone context. However, glycitein was not tested in isolation, and no efficacy conclusions were drawn. Men with prostate cancer should consult their oncologist before using any isoflavone supplement, as hormonal interactions may be clinically significant.

### How does glycitein work as a phytoestrogen?

Glycitein functions as a selective estrogen receptor modulator (SERM), binding to both ERα and ERβ receptors with varying affinities. This binding allows it to mimic or block estrogen activity depending on the tissue and receptor context, similar in principle to pharmaceutical SERMs. In animal studies, glycitein produced a 150% increase in uterine weight, confirming estrogenic activity, though it is considered less potent than genistein or natural estradiol. It also inhibits protein kinase C and tyrosine kinases involved in estrogen-sensitive cell signaling pathways.

### Can glycitein support heart health?

Laboratory research suggests glycitein may offer cardiovascular benefits by inhibiting the proliferation of aortic smooth muscle cells at concentrations of 0.1–30 μmol/L. Excessive smooth muscle cell proliferation contributes to atherosclerosis and arterial stiffness, so this inhibitory effect is considered a potentially cardioprotective mechanism. Additionally, glycitein's antioxidant activity via ROS scavenging may reduce oxidative stress implicated in cardiovascular disease. However, all available evidence is preliminary and derived from in vitro studies — no human cardiovascular trials have been conducted.

### Does glycitein have antioxidant effects?

Yes, glycitein demonstrates antioxidant activity through two primary mechanisms: direct reactive oxygen species (ROS) scavenging and activation of the Nrf2-ARE signalling pathway, which upregulates the body's own antioxidant enzyme production. These mechanisms have been characterised in mechanistic and cell-based studies. Oxidative stress is implicated in ageing, cardiovascular disease, and cancer, making antioxidant activity a significant area of interest. That said, current antioxidant evidence for glycitein remains at the laboratory level and has not been validated in human clinical trials.

### Can I take glycitein with hormone therapy or hormonal medications?

Glycitein's SERM activity means it interacts with estrogen receptors, which creates a theoretical potential for interaction with hormone replacement therapy, oral contraceptives, tamoxifen, or other hormone-modulating medications. Because glycitein can both mimic and modulate estrogen signalling depending on tissue type and receptor subtype, combining it with hormonal treatments may alter their efficacy or safety profile. There are no human studies directly evaluating these interactions for glycitein specifically. Anyone using hormonal medications should seek medical guidance before adding glycitein or soy isoflavone supplements.

### What are the potential side effects of glycitein?

Clinical safety data for glycitein alone is extremely limited. Within the only human trial identified — a phase I study using a mixed isoflavone supplement at 300–600 mg genistein equivalents daily for 84 days — no genotoxicity was observed. Because glycitein acts as a phytoestrogen, theoretical concerns include hormonal disruption, particularly with high or prolonged intake, especially in hormone-sensitive individuals. Animal studies showed uterine weight changes, indicating estrogenic activity. Individuals with hormone-sensitive conditions, such as estrogen receptor-positive breast cancer, should exercise caution and consult a healthcare provider.

### What foods contain glycitein naturally?

Glycitein is found primarily in soybeans and soy products like tofu, tempeh, and soy flour. Fermented soy products typically contain higher bioavailable concentrations due to bacterial conversion of glycitin to glycitein.

### How much glycitein is in soy products?

Soy flour contains approximately 5-25 mg glycitein per 100g, while tofu contains 1-10 mg per 100g. Fermented products like miso can contain 10-50 mg per 100g depending on fermentation time and bacterial strains used.

### Is glycitein the same as genistein?

No, glycitein and genistein are different isoflavone compounds with distinct molecular structures. Glycitein has a methoxy group at position 6, while genistein lacks this modification, resulting in different biological activities and receptor binding affinities.

### Can glycitein help with menopause symptoms?

Limited research suggests glycitein's estrogenic activity may help with menopausal symptoms, but specific clinical trials are lacking. Most menopause research focuses on mixed isoflavone supplements rather than isolated glycitein compounds.

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*Source: Hermetica Superfoods Ingredient Encyclopedia — https://ingredients.hermeticasuperfoods.com*
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