Hermetica Superfood Encyclopedia
The Short Answer
Astragaloside IV is a triterpene saponin extracted from Astragalus membranaceus root that demonstrates anti-inflammatory and antioxidant properties. It works primarily by inhibiting NF-κB signaling pathways and activating Nrf2-mediated antioxidant responses.
CategoryNamed Bioactive Compounds
GroupCompound
Evidence LevelStrong
Primary Keywordastragaloside IV benefits
Synergy Pairings3
Astragaloside IV — botanical close-up
Health Benefits
Origin & History
Natural habitat
Astragaloside IV (AS-IV) is a pentacyclic triterpenoid saponin isolated from the dried root of Astragalus membranaceus, a traditional Chinese medicinal herb. It is extracted using n-butanol followed by HPLC purification, with the Chinese Pharmacopoeia requiring a minimum content of 0.080% AS-IV in quality Astragali Radix preparations.
“Astragaloside IV is the primary active constituent in Astragalus membranaceus, used in Traditional Chinese Medicine for centuries to tonify qi and treat fatigue, immune deficiency, and cardiovascular issues. Modern pharmacological research on its anti-tumor, anti-inflammatory, and antioxidant properties aligns with these traditional applications.”Traditional Medicine
Scientific Research
The research dossier reveals a critical gap: no human clinical trials, RCTs, or meta-analyses for Astragaloside IV were identified. All available evidence comes from preclinical studies using in vitro and animal models, with researchers calling for human trials to validate observed anticancer, anti-inflammatory, and cardioprotective effects.
Preparation & Dosage
Traditional preparation
No clinically studied dosage ranges for humans have been established. Preclinical studies use concentrations of 50-100 ng/mL in cell culture models, but these cannot be extrapolated to human dosing. Consult a healthcare provider before starting any new supplement.
Nutritional Profile
Astragaloside IV is a purified triterpenoid saponin compound (cycloartane-type), not a whole food ingredient, therefore it contains no meaningful macronutrients, dietary fiber, vitamins, or minerals in its isolated form. Molecular weight: 784.98 g/mol (C41H68O14). It is the primary bioactive glycoside extracted from Astragalus membranaceus root, typically present at 0.01–0.04% by dry weight in raw root material. As an isolated compound, it is administered in concentrations ranging from 25–100 mg/kg in preclinical animal models and at 50–100 ng/mL in cell culture studies. Bioavailability is notably poor when taken orally: absolute oral bioavailability is estimated at approximately 2.2–3.8% in rodent models due to low intestinal permeability and extensive first-pass metabolism, with a Tmax of approximately 0.5–1 hour and half-life of roughly 2–4 hours. Gut microbiota partially hydrolyze the glycoside moieties, producing aglycone metabolites (cycloastragenol) which may exhibit enhanced membrane permeability. Lipophilicity is low-to-moderate (logP approximately 0.3), limiting passive diffusion. Nanoparticle and phospholipid complex formulations have been shown in preclinical studies to increase bioavailability by 3–5 fold. No caloric, protein, fat, or carbohydrate content is nutritionally relevant in supplemental doses (typically 5–50 mg per dose in commercial preparations).
How It Works
Mechanism of Action
Astragaloside IV suppresses inflammatory responses by blocking NF-κB nuclear translocation and inhibiting the TLR4/MyD88 signaling cascade. It enhances cellular antioxidant defenses through Nrf2 pathway activation, increasing expression of antioxidant enzymes like HO-1 and NQO1. The compound also modulates cell cycle proteins and promotes apoptosis in abnormal cells through p53 and caspase pathway activation.
Clinical Evidence
Current evidence for astragaloside IV is primarily limited to preclinical studies and in vitro research. Animal studies have shown anti-inflammatory effects at doses of 10-50 mg/kg, with significant reductions in inflammatory markers like TNF-α and IL-6. Antioxidant activity has been demonstrated in cell culture studies using concentrations of 1-100 μM. No human clinical trials have been published to date, making clinical efficacy and optimal dosing unclear.
Safety & Interactions
Safety data for astragaloside IV in humans is limited due to lack of clinical trials. Animal studies suggest good tolerability at therapeutic doses, though higher concentrations may cause gastrointestinal upset. No specific drug interactions have been documented, but theoretical interactions may exist with immunosuppressive medications due to immune-modulating effects. Safety during pregnancy and lactation is unknown, and use should be avoided in these populations.
Synergy Stack
Hermetica Formulation Heuristic
Also Known As
AS-IV3-O-β-D-xylopyranosyl-6-O-β-D-glucopyranosyl-cycloastragenolCycloastragenol 3-O-β-D-xylopyranosyl-6-O-β-D-glucopyranosideAstragaloside A4Huangqi Saponin IVAST-IV
Frequently Asked Questions
What is the typical dosage of astragaloside IV?
No established human dosage exists for astragaloside IV due to lack of clinical trials. Animal studies have used doses equivalent to 10-50 mg/kg body weight, but human dosing requires clinical validation.
How long does astragaloside IV take to work?
In animal studies, anti-inflammatory effects of astragaloside IV were observed within 2-4 hours of administration. However, sustained benefits for chronic conditions may require weeks of consistent use based on preclinical data.
Can astragaloside IV be taken with blood pressure medications?
No specific interactions with blood pressure medications have been documented. However, astragaloside IV may have cardiovascular effects, so consultation with a healthcare provider is recommended before combining with antihypertensive drugs.
Is astragaloside IV better than regular astragalus extract?
Astragaloside IV is a concentrated active compound from astragalus, potentially offering more potent effects than whole plant extracts. However, standardized astragalus extracts contain multiple bioactive compounds that may work synergistically.
What foods contain astragaloside IV naturally?
Astragaloside IV is found exclusively in Astragalus membranaceus (huang qi) root and is not present in common foods. The compound requires extraction and concentration processes to achieve therapeutic levels found in supplements.
What does current clinical research show about astragaloside IV's effectiveness in humans?
Most evidence for astragaloside IV comes from laboratory and animal studies, with limited human clinical trials available. Current research demonstrates promise for immune support and antioxidant activity, but larger-scale human studies are needed to establish efficacy for specific health claims. The quality of evidence is considered preliminary rather than conclusive for most proposed benefits.
Is astragaloside IV safe for long-term use?
Astragaloside IV has been used in traditional Chinese medicine for centuries with a favorable safety profile in short-term studies, though long-term safety data in humans remains limited. Most reported adverse effects are mild and rare, but individuals with autoimmune conditions should consult a healthcare provider before long-term use due to potential immune-stimulating effects. Current evidence does not establish optimal duration or any specific safety concerns with extended supplementation.
How does astragaloside IV absorption affect its biological activity?
Astragaloside IV has low bioavailability when taken orally due to poor intestinal absorption and extensive hepatic metabolism, which is why some formulations use delivery systems or standardized extracts to enhance absorption. The compound's rapid metabolism by the liver and gut microbiota means that most ingested astragaloside IV is converted into metabolites before entering systemic circulation. Taking astragaloside IV with fat-containing meals may improve absorption compared to intake on an empty stomach.
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