Quick Summary

Astragalus membranaceus is a traditional Chinese medicinal herb extensively studied for its potential immunomodulatory, anticancer, anti-inflammatory, and metabolic regulatory effects. Clinical research mainly evaluates its use as an adjunctive therapy in cancer, diabetic kidney disease, metabolic disorders, and immune-related conditions. Evidence from randomized controlled trials (RCTs) and meta-analyses suggests it may help improve immune function, reduce cancer-related fatigue, enhance chemoradiotherapy effectiveness, and modulate inflammation and metabolism. Safety data indicate a generally favorable profile with mostly mild adverse effects; however, robust long-term safety and drug interaction data are limited.

What Is It?

Astragalus membranaceus, commonly known as Astragalus or Huang Qi in Traditional Chinese Medicine (TCM), is a perennial plant native to East Asia. The root of the plant is traditionally used for medicinal purposes. It is valued for its purported ability to support the immune system and enhance vitality.

Traditional Uses

  • Support for immune health and resistance to illness
  • Adjunctive treatment to enhance recovery during illness
  • Management of fatigue and general weakness
  • Traditional adjunct in cancer care to strengthen the body
  • Support kidney health and metabolism in TCM formulations

Active Compounds

Astragalus contains several bioactive constituents, including:

  • Polysaccharides – believed to influence immune modulation
  • Saponins (Astragalosides) – studied for anti-inflammatory and potential anticancer effects
  • Flavonoids – with antioxidant and metabolic regulatory properties
  • Other phytochemicals contributing to the herb’s pharmacological profile

Potential Benefits with Evidence Levels

  • Cancer-related fatigue: Level 1a evidence (systematic reviews and meta-analyses of RCTs) suggest Astragalus supplementation may reduce cancer-related fatigue and improve quality of life in cancer patients. Evidence is limited by small studies and heterogeneity across cancer types.
  • Adjunctive cancer therapy (including cervical cancer, malignant tumors): Moderate quality evidence from meta-analyses indicates that Astragalus polysaccharides combined with chemoradiotherapy may improve tumor response rates, enhance immune parameters (e.g., T cell counts), and reduce treatment-related toxicity. Further well-designed multicenter trials are needed.
  • Immune function enhancement: Low to moderate quality evidence from RCT meta-analyses suggests Astragalus extracts might increase T-cell subsets (CD3+, CD4+, CD4+/CD8+ ratio) and modulate inflammatory cytokines in conditions like cancer and HIV/AIDS, supporting immune restoration as adjunctive therapy.
  • Diabetic kidney disease (DKD): Low to moderate quality meta-analysis evidence shows Astragalus-containing TCM formulations may exert renoprotective effects such as lowering albuminuria and improving renal function when added to standard DKD treatment.
  • Type 2 diabetes and metabolic syndrome: Moderate quality meta-analyses and mechanistic studies report improvements in glycemic control, lipid profiles, insulin resistance, and inflammatory markers, though with some heterogeneity and methodological limitations.
  • Acute non-small cell lung cancer (NSCLC): Low to moderate quality meta-analysis evidence indicates Astragalus-containing injections combined with chemotherapy may improve immune function, increase objective response rates, and reduce chemotherapy adverse reactions.
  • Other indications with emerging evidence: Preliminary clinical and mechanistic evidence (low to moderate quality) suggest potential immunomodulatory and anti-inflammatory effects in immune thrombocytopenia, atopic dermatitis, diabetic retinopathy, and post-stroke recovery, requiring further trials for confirmation.

Side Effects

Astragalus membranaceus and its polysaccharides are generally well tolerated with a low incidence of adverse effects reported. Mild gastrointestinal symptoms such as nausea and abdominal discomfort have been noted. In cancer patients using polysaccharide supplements, rare mild effects like hand-foot numbness and weakness have been reported.

Drug Interactions

Current evidence on interactions between Astragalus and conventional drugs, particularly chemotherapeutics and immunotherapies, is limited. Caution is advised due to possible immunomodulatory effects and potential influence on cytochrome P450 enzymes, which may alter drug metabolism. More research is needed to clarify interaction risks.

Who Should Avoid It?

  • Individuals on immunosuppressive therapy or with autoimmune disorders should use Astragalus cautiously and only under medical supervision.
  • Pregnant or breastfeeding women should avoid Astragalus supplementation due to insufficient safety data.
  • People with known allergies to Astragalus or related plants should avoid use.

Evidence Limitations

  • Many clinical studies include small sample sizes, heterogeneous populations, and short durations.
  • Lack of high-quality, large-scale, multicenter RCTs limits generalizability.
  • Variability in Astragalus preparations and dosages complicate reproducibility and comparison of results.
  • Long-term safety and drug interaction data are insufficient, especially for cancer and immunocompromised patients.
  • Some findings derive primarily from preclinical studies with limited direct human clinical evidence.
  • Inconsistent outcome measures and reporting limit clarity in meta-analyses.

References

  • Efficacy of Astragalus Membranaceus (Huang Qi) for Cancer-Related Fatigue: A Systematic Review and Meta-Analysis of Randomized Controlled Studies. PMID: 40302232. DOI: 10.1177/15347354241313344 (2025)
  • Astragalus polysaccharides combined with radiochemotherapy for cervical cancer: a systematic review and meta-analysis of randomized controlled studies. PMID: 41306775. DOI: 10.3389/fphar.2025.1699902 (2025)
  • Efficacy and safety of astragalus polysaccharides in patients with malignant tumors: A systematic review and meta-analysis. PMID: 40208321. DOI: 10.1007/s00210-025-04074-2 (2025)
  • Effects of Kang’ai injection combined with chemotherapy on immune function in advanced non-small cell lung cancer: a meta-analysis. PMID: 41660512. DOI: 10.3389/fphar.2026.1743226 (2026)
  • Effects of TA-65 on telomere length, functional outcomes, and inflammation: a systematic review and meta-analysis. PMID: 41286474. DOI: 10.1007/s10565-025-10115-6 (2025)
  • Efficacy and potential mechanism of main active ingredients of Astragalus membranaceus in animals with hepatocellular carcinoma: a systematic review and meta-analysis. PMID: 41815161. DOI: 10.21037/tcr-2025-aw-2426 (2026)
  • Potential Effects of Bioactive Compounds of Plant-Based Foods and Medicinal Plants in Chronic Kidney Disease and Dialysis: A Systematic Review. PMID: 39770942. DOI: 10.3390/nu16244321 (2024)
  • Chinese Herbal Medicine in the Treatment of Chronic Kidney Disease: A Narrative Review of Mechanisms and Therapeutic Potential. PMID: 41347220. DOI: 10.5812/ijpr-165904 (2025)
  • Evaluating efficacy and mechanism of traditional Chinese medicine in diabetes treatment: a meta-analysis and network pharmacology study. PMID: 41127514. DOI: 10.3389/fendo.2025.1605091 (2025)
  • Traditional Chinese Medicine for Allergic Rhinitis: Mechanisms, Evidence, and Gut-Immune Axis Targets. PMID: 41541602. DOI: 10.2147/jaa.s571460 (2026)
  • Exploring the Neuroprotective Potential of Astragalus membranaceus in Central Nervous System Diseases. PMID: 41463327. DOI: 10.3390/biom15121671 (2025)
  • Astragalus in Acute Pancreatitis: Insights from Network Pharmacology, Molecular Docking, and Meta-Analysis Validation. PMID: 40699778. DOI: 10.3390/cimb47050379 (2025)
  • Safety Considerations for Natural Products with Adaptogenic and Immunomodulating Activities. PMID: 40872598. DOI: 10.3390/ph18081208 (2025)

Last Reviewed

April 2024

Disclaimer

This information is provided for educational purposes only and is not intended as medical advice. The potential health benefits of Astragalus membranaceus are based on currently available research, which may change as new evidence emerges. Always consult a qualified healthcare professional before starting any new herbal supplement, especially if you are pregnant, breastfeeding, have a medical condition, or are taking other medications.