# Huang Qi (Astragalus propinquus) **Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/huang-qi **Data Source:** Hermetica Superfoods Ingredient Encyclopedia **Updated:** 2026-03-19 **Evidence Score:** 8 / 10 **Category:** Traditional Chinese Medicine **Also Known As:** Astragalus propinquus, Astragalus membranaceus, Chinese Astragalus, Milk Vetch Root, Bei Qi, Radix Astragali, Mongolian Milkvetch, Membranous Milk Vetch ## Overview Astragalus propinquus contains immunomodulating polysaccharides and astragaloside IV that may enhance immune cell activity and provide [antioxidant protection](/ingredients/condition/antioxidant). The root extract has been studied for its potential to support [immune function](/ingredients/condition/immune-support) and reduce [inflammatory](/ingredients/condition/inflammation) responses. ## Health Benefits • May support [immune function](/ingredients/condition/immune-support) through immunoregulatory polysaccharides and saponins (evidence: pharmacological research only) • Potential [antioxidant activity](/ingredients/condition/antioxidant) from flavonoids and astragaloside compounds (evidence: non-clinical studies) • May help with inflammation through [anti-inflammatory](/ingredients/condition/inflammation) compounds (evidence: basic research only) • Possible anti-fatigue effects based on traditional use for weakness and fatigue (evidence: traditional use reports) • Potential [cardiovascular](/ingredients/condition/heart-health) support via hypolipidemic activity (evidence: preliminary pharmacological data) ## Mechanism of Action Astragalus polysaccharides activate macrophages and enhance [T-cell](/ingredients/condition/immune-support) proliferation through toll-like receptor pathways. Astragaloside IV provides [antioxidant activity](/ingredients/condition/antioxidant) by scavenging free radicals and upregulating antioxidant enzymes like superoxide dismutase. Flavonoids including quercetin and kaempferol inhibit [pro-inflammatory cytokine](/ingredients/condition/inflammation)s TNF-α and IL-6 production. ## Clinical Summary Current evidence for astragalus is limited to preclinical studies and small human trials. Laboratory studies demonstrate immune-stimulating effects of astragalus polysaccharides on immune cell cultures. A few small clinical trials with 30-60 participants suggested potential benefits for upper respiratory health, but larger randomized controlled trials are needed. Most research focuses on in vitro [antioxidant](/ingredients/condition/antioxidant) and [anti-inflammatory](/ingredients/condition/inflammation) activities rather than human clinical outcomes. ## Nutritional Profile Huang Qi (Astragalus propinquus) is a medicinal root with a complex phytochemical profile rather than a conventional nutritional profile. Key bioactive compounds include: Polysaccharides (astragalans, APS) comprising approximately 25-40% of dry root weight, serving as primary [immunomodulatory](/ingredients/condition/immune-support) agents; Saponins dominated by cycloastragenol and astragalosides I-IV (particularly astragaloside IV at approximately 0.02-0.08% dry weight), with astragaloside IV being the most pharmacologically studied compound; Flavonoids including calycosin (approximately 0.01-0.05% dry weight), formononetin, calycosin-7-glucoside, and ononin, contributing [antioxidant activity](/ingredients/condition/antioxidant). Macronutrient composition of dried root: Crude protein approximately 9-13% dry weight (primarily non-essential amino acids including gamma-aminobutyric acid and proline); Carbohydrates approximately 40-60% dry weight (largely structural polysaccharides and starch); Crude fiber approximately 15-25% dry weight; Crude fat approximately 1-3% dry weight. Micronutrients detected include trace amounts of selenium (approximately 0.01-0.05 mg/100g), iron, zinc, manganese, and potassium, though concentrations vary significantly by growing region and soil composition. Bioavailability notes: Astragaloside IV has poor oral bioavailability (<5%) due to its molecular size and glycoside structure; gut microbiota can hydrolyze astragalosides to the more bioavailable aglycone cycloastragenol; polysaccharides are largely non-digestible but exert [prebiotic](/ingredients/condition/gut-health) and immunological effects in the gut lumen; alcohol-based extracts yield higher saponin concentrations while water decoctions favor polysaccharide extraction. Typical therapeutic preparations use 9-30g dried root in decoction form. ## Dosage & Preparation No clinically studied dosage ranges are available from the research. The sources describe chemical compositions but provide no specific dosing information from human studies. Consult a healthcare provider before starting any new supplement. ## Safety & Drug Interactions Astragalus is generally well-tolerated with mild side effects including digestive upset and skin rash in sensitive individuals. It may interact with immunosuppressive medications like cyclosporine by counteracting their effects. The herb could potentially interfere with lithium clearance and affect blood sugar levels. Pregnant and breastfeeding women should avoid astragalus due to insufficient safety data. ## Scientific Research The research dossier contains no specific human clinical trials, RCTs, or meta-analyses with PMIDs. While pharmacological research notes potential [antioxidant](/ingredients/condition/antioxidant), [anti-inflammatory](/ingredients/condition/inflammation), immunoregulatory, anticancer, and hypolipidemic activities from extract components, these findings are not substantiated by human clinical evidence. ## Historical & Cultural Context In Traditional Chinese Medicine, Huang Qi has been used for over 2,000 years as a nourishing tonic herb to tonify qi, strengthen spleen and lungs, promote diuresis, and treat fatigue, weakness, edema, and infections. It remains a core herb in TCM formulas for [immune support](/ingredients/condition/immune-support) and vitality. ## Synergistic Combinations Ginseng, Reishi mushroom, Rhodiola, Schisandra, Licorice root ## Frequently Asked Questions ### What is the active compound in astragalus? The primary bioactive compounds are immunomodulating polysaccharides and astragaloside IV, a triterpene saponin. These compounds are concentrated in the root and responsible for most therapeutic effects. ### How much astragalus should I take daily? Typical dosages range from 500-2000mg of standardized extract daily, or 9-30g of dried root in traditional preparations. Clinical studies have used 7.5-30g daily of raw herb equivalent. ### Can astragalus boost immune system function? Laboratory studies show astragalus polysaccharides can enhance T-cell and macrophage activity. However, human clinical evidence is limited to small trials, and more research is needed to confirm immune benefits. ### Does astragalus interact with blood pressure medications? Astragalus may have mild blood pressure-lowering effects and could potentially enhance the effects of antihypertensive medications. Patients on blood pressure drugs should monitor levels and consult healthcare providers. ### Is astragalus safe for autoimmune conditions? Astragalus stimulates immune activity, which could potentially worsen autoimmune conditions like rheumatoid arthritis or multiple sclerosis. People with autoimmune diseases should avoid astragalus or use only under medical supervision. ### What is the difference between Astragalus propinquus and other astragalus species used in supplements? Astragalus propinquus (Huang Qi) is the primary species used in traditional Chinese medicine and most modern supplements, valued for its polysaccharide and astragaloside content. Other astragalus species like A. membranaceus exist but are often considered interchangeable in traditional practice, though A. propinquus is considered the authentic Huang Qi. Supplement labels may use different species names; verifying the botanical name ensures you're getting the traditionally-used form. ### Is astragalus safe to take long-term, and are there any cumulative effects? Astragalus is traditionally used for extended periods in Chinese medicine without established safety limits, though long-term human clinical data is limited. Some herbal practitioners recommend periodic breaks or rotation with other herbs, though this is based on traditional practice rather than clinical evidence. If taking astragalus long-term, periodic consultation with a healthcare provider is advisable, particularly if you have autoimmune or medication-sensitive conditions. ### How does the quality and processing method of astragalus affect its potency? Astragalus polysaccharide content and bioavailability vary significantly based on extraction method—decoctions (traditional boiling) and standardized extracts may differ in compound profiles and effectiveness. Root quality, growing conditions, and harvest timing influence polysaccharide concentrations, with older roots traditionally considered more potent. Standardized extracts guarantee polysaccharide or astragaloside percentages, whereas whole root powders provide variable potency unless third-party tested. --- *Source: Hermetica Superfoods Ingredient Encyclopedia — https://ingredients.hermeticasuperfoods.com* *License: CC BY-NC-SA 4.0 — Attribution required. Commercial use: admin@hermeticasuperfoods.com*