# Iridin

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/iridin
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-03-20
**Evidence Score:** 2 / 10
**Category:** Compound
**Also Known As:** 7-O-methylirigenin, Iridin 4'-methylether, Belamcandin, Shegan flavonoid, Chinese blackberry lily isoflavone, Leopard lily compound

## Overview

Iridin is an isoflavone glycoside derived primarily from Iris species plants, where it is hydrolyzed in the body to its active aglycone form, irigenin. Its primary mechanisms include inhibition of [pro-inflammatory cytokine](/ingredients/condition/inflammation) production and induction of apoptosis in cancer cell lines via cell cycle arrest at the G2/M checkpoint.

## Health Benefits

• Reduces inflammation and cytokine production in mouse models, indicating potential [anti-inflammatory](/ingredients/condition/inflammation) properties [1][2]. • Induces G2/M cell cycle arrest and apoptosis in AGS gastric cancer cells, suggesting antitumor effects [4]. • Inhibits abnormal [glycolysis](/ingredients/condition/weight-management) in immune cells, thereby suppressing inflammation [1][2]. • Promotes M2 macrophage polarization, supporting anti-inflammatory responses [1][2]. • Exhibits antiglycation effects, which may combat advanced glycation end-products [4][5].

## Mechanism of Action

Iridin is metabolized to irigenin, which suppresses NF-κB signaling to reduce downstream production of [pro-inflammatory cytokine](/ingredients/condition/inflammation)s such as TNF-α, IL-6, and IL-1β. In gastric cancer cell lines, irigenin induces G2/M cell cycle arrest by downregulating cyclin B1 and CDC2 expression while activating caspase-3-dependent apoptotic pathways. Additionally, iridin inhibits abnormal [glycolysis](/ingredients/condition/weight-management) in activated immune cells by targeting key glycolytic enzymes, thereby modulating immune cell hyperactivation.

## Clinical Summary

Current evidence for iridin is limited almost entirely to in vitro cell culture studies and rodent models, with no published human clinical trials as of 2024. Mouse model studies have demonstrated measurable reductions in [inflammatory](/ingredients/condition/inflammation) cytokine levels and tumor growth inhibition, but these findings have not been validated in human subjects. In vitro studies using AGS gastric cancer cell lines showed dose-dependent induction of apoptosis, with specific concentrations in the micromolar range producing statistically significant effects. The overall evidence base must be characterized as preliminary, and extrapolation to human therapeutic use requires significant caution.

## Nutritional Profile

Iridin is an isoflavone glycoside (iridoid-class flavonoid) derived primarily from Iris species (e.g., Iris versicolor, Iris germanica). It is not a macronutrient source but functions as a bioactive phytochemical. The core aglycone is irigenin, linked to a glucoside moiety. Typical concentrations in Iris rhizomes range from 0.1–0.5% dry weight. As a flavonoid glycoside, oral bioavailability is limited without gut microbial deglycosylation to release the active irigenin aglycone; absorption is estimated to be low-to-moderate (~10–30% relative bioavailability, comparable to other isoflavone glycosides). It contains no meaningful vitamins, minerals, fiber, or protein. Key bioactive mechanisms include [NF-κB](/ingredients/condition/inflammation) pathway inhibition, AMPK-mediated [glycolysis](/ingredients/condition/weight-management) suppression in macrophages, and caspase-3/9 activation in cancer cell lines. No established dietary reference values exist; research doses in mouse models typically range from 20–100 mg/kg body weight.

## Dosage & Preparation

Preclinical studies used in vitro doses of 12.5-50 μM in RAW264.7 cells and oral doses of 20-80 mg/kg in mice. A rat pharmacokinetic study used a 100 mg/kg oral dose. Consult a healthcare provider before starting any new supplement.

## Safety & Drug Interactions

Human safety data for iridin supplementation is largely absent, as no formal clinical toxicology trials have been conducted in human populations. As an isoflavone, iridin may exhibit weak estrogenic activity via binding to estrogen receptors, making it a theoretical concern for individuals with hormone-sensitive conditions such as estrogen receptor-positive breast cancer or endometriosis. Potential interactions with anticoagulant drugs like warfarin and immunosuppressant medications cannot be ruled out given its effects on immune cell signaling. Pregnant and breastfeeding women should avoid iridin supplementation due to the complete absence of safety data in these populations.

## Scientific Research

There are no human clinical trials or meta-analyses available for iridin. All current evidence is based on preclinical studies conducted on cell lines and animal models, such as murine RAW264.7 macrophages and C57BL/6 mice [1][2][3][4][5].

## Historical & Cultural Context

Iridin is a key bioactive component in Belamcanda chinensis, traditionally used in Chinese medicine for its [anti-inflammatory](/ingredients/condition/inflammation) and antitumor activities. However, specific historical uses of iridin itself are not detailed in available sources.

## Synergistic Combinations

Iridin pairs well with Quercetin, as both inhibit NF-κB and [pro-inflammatory cytokine](/ingredients/condition/inflammation) production (TNF-α, IL-6) through complementary upstream targets — Iridin suppressing glycolytic reprogramming via AMPK while Quercetin inhibits IκB kinase, producing additive anti-inflammatory effects. Combining Iridin with Piperine (from black pepper) is strategically valuable because piperine inhibits P-glycoprotein efflux and glucuronidation enzymes (UGT1A1), potentially increasing the systemic bioavailability of irigenin aglycone by 20–50%, similar to piperine's documented enhancement of other flavonoid glycosides. Pairing with EGCG (Epigallocatechin gallate from green tea) may enhance the antitumor synergy, as both promote G2/M cell cycle arrest through overlapping but distinct mechanisms — Iridin activating checkpoint kinase pathways and EGCG downregulating cyclin B1/CDK1 expression — while EGCG's additional promotion of M2 macrophage polarization reinforces Iridin's documented [immunomodulatory](/ingredients/condition/immune-support) profile.

## Frequently Asked Questions

### What plant does iridin come from?

Iridin is primarily found in plants of the Iris genus, including Iris versicolor and Iris florentina (orris root), where it occurs as a naturally occurring isoflavone glycoside. It has also been identified in smaller quantities in other members of the Iridaceae family. Traditional herbal preparations using Iris rhizomes contain iridin as one of several bioactive constituents.

### Is iridin the same as irigenin?

Iridin and irigenin are closely related but chemically distinct compounds. Iridin is the glycoside form, meaning it has a sugar molecule (glucose) attached to the isoflavone backbone, while irigenin is the aglycone — the active form produced after enzymatic hydrolysis removes that sugar group. In the body, iridin is converted to irigenin, which is considered the pharmacologically active molecule responsible for most observed biological effects.

### Can iridin help with cancer?

Laboratory studies have shown that irigenin, the active metabolite of iridin, induces G2/M cell cycle arrest and activates caspase-3-mediated apoptosis in AGS human gastric cancer cells in vitro. These findings are scientifically interesting but have not been replicated in human clinical trials, meaning iridin cannot be considered a cancer treatment or preventive agent at this time. Individuals with cancer should consult an oncologist before using any isoflavone supplement.

### What is the anti-inflammatory mechanism of iridin?

Iridin's anti-inflammatory activity operates primarily through suppression of the NF-κB transcription factor pathway, which controls the expression of genes encoding pro-inflammatory mediators including TNF-α, IL-6, and IL-1β. Mouse model studies have demonstrated measurable reductions in these cytokines following iridin administration, suggesting downstream modulation of the inflammatory cascade. Additionally, iridin has been observed to inhibit aberrant glycolytic metabolism in immune cells, which can drive chronic inflammation when dysregulated.

### Are there any iridin supplements available and what dosage is recommended?

Iridin is not widely available as a standardized standalone supplement, and it appears most commonly as an unstandardized constituent of whole Iris root or orris root herbal extracts. Because no human clinical trials have established effective or safe dosage ranges, there is currently no evidence-based recommended daily dose for iridin. Anyone considering its use should consult a healthcare provider, particularly given its potential estrogenic activity and unknown interaction profile with pharmaceuticals.

### What foods contain iridin naturally?

Iridin is found primarily in iris plants and certain flowering species, though it is not commonly present in typical dietary foods like fruits, vegetables, or grains. The compound is most accessible through iris root extracts or specialized herbal preparations rather than through conventional food sources. This limited dietary availability is why iridin is primarily obtained through targeted supplementation rather than diet alone.

### Is iridin safe to use alongside immune-modulating medications?

Because iridin promotes M2 macrophage polarization and modulates cytokine production, individuals taking immune-suppressing medications (such as those for autoimmune conditions) should consult a healthcare provider before use. The compound's mechanism of shifting immune cell responses could potentially interact with or reduce the effectiveness of certain immunosuppressive therapies. Medical supervision is recommended to ensure safe concurrent use.

### How does the research evidence for iridin compare to other anti-inflammatory plant compounds?

Current evidence for iridin is primarily derived from in vitro and mouse model studies, which is less robust than human clinical trials available for established anti-inflammatory ingredients like curcumin or quercetin. While iridin shows promising mechanisms in reducing inflammation and inhibiting abnormal glycolysis in immune cells, the lack of large-scale human studies limits definitive claims about its efficacy compared to better-studied compounds. More clinical research is needed to establish iridin's practical effectiveness in human populations relative to similar bioactive compounds.

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