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Astragalus

supporting immune health and general well-being

herb
Human trial evidenceTraditional useInteraction riskNeeds more research

Immune-tonifying TCM root for resilience and longevity.

Astragalus (Astragalus membranaceus) is a traditional Chinese herb that has been used for centuries, often in combination with other herbs. It is recognized for its potential adaptogenic properties, meaning it may help the body adapt to stress. Historically, it has been employed to support various bodily functions, including immune health and overall vitality. While widely used in traditional practices, scientific research into its specific mechanisms and efficacy for modern health conditions is ongoing. Many of its purported benefits are attributed to its active compounds, such as polysaccharides and triterpenoids.

Quick answer

What it is: Astragalus (Astragalus membranaceus) is a traditional Chinese herb that has been used for centuries, often in combination with other herbs.

May support:Lyme Disease, Cancer (Adjunctive Support)

Evidence Summary

Given the lack of provided PubMed studies, the current evidence grade for specific health claims related to Astragalus is considered insufficient. While it has a long history of traditional use, robust scientific evidence from well-designed clinical trials is needed to substantiate many of its purported benefits. Therefore, any claims regarding efficacy are based on traditional knowledge rather than modern scientific validation.

Last reviewed · Jun 2026

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Why It Works

Polysaccharides stimulate T cells and macrophages.

How to use

Always consult a qualified clinician.

Editorial guidance

Suggested dosage
500–3000 mg/day
Typical forms
capsule, tincture, tea, powder, dried root
Quality markers
Look for products standardized for active compounds like polysaccharides. Reputable brands often provide third-party testing for purity and potency. Choose products free from fillers, artificial ingredients, and heavy metals.
Medication interactions
  • immunosuppressants (potential to counteract effects)
  • anticoagulants (theoretical interaction, monitor closely)
Avoid if
  • autoimmune disease (potential immune stimulation)
  • pregnant or breastfeeding (insufficient data)
  • organ transplant recipient (potential immune stimulation)

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Suggested dosage

500–3000 mg/day

General guidance — discuss specifics with a clinician.

Active medicinal compounds

Key active compounds in Astragalus include polysaccharides (e.g., astragalans), triterpene saponins (e.g., astragalosides I-VII), and flavonoids. These compounds are believed to contribute to its various biological activities.

Traditional use

In Traditional Chinese Medicine (TCM), Astragalus (Huang Qi) has been used for thousands of years as a tonic herb. It is traditionally valued for strengthening 'Qi' (vital energy), supporting the immune system, promoting wound healing, and enhancing overall vitality. It is often included in herbal formulas to address fatigue, weakness, and susceptibility to illness.

Safety

Safety warnings

Avoid in acute infection and autoimmunity.

Avoid if

  • autoimmune disease (potential immune stimulation)
  • pregnant or breastfeeding (insufficient data)
  • organ transplant recipient (potential immune stimulation)

Medication interactions

  • immunosuppressants (potential to counteract effects)
  • anticoagulants (theoretical interaction, monitor closely)

Reported side effects

  • mild gastrointestinal upset

General guidance — discuss specifics with a clinician.

Evidence ecosystem

Scientific literature, clinical guidance, government sources, ongoing research, traditional use, and lived experience — grouped by source type and quality.

Overall grade

Given the lack of provided PubMed studies, the current evidence grade for specific health claims related to Astragalus is considered insufficient. While it has a long history of traditional use, robust scientific evidence from well-designed clinical trials is needed to substantiate many of its purported benefits. Therefore, any claims regarding efficacy are based on traditional knowledge rather than modern scientific validation.

Filter by source type

Observational Studies(1)

Cohort, case-control, and cross-sectional human studies.

Moderate Quality
  • A Comprehensive Review of Herbal Supplements Used for Persistent Symptoms Attributed to Lyme Disease.

    Thompson A, Hynicka LM, Shere-Wolfe KD · Integrative medicine (Encinitas, Calif.) · 2023

    Lyme disease is the most common, tick-borne disease in the USA. While most patients successfully recover with antibiotics, some patients experience persistent symptoms for months to years. Patients who attribute chronic symptoms to Lyme disease commonly use herbal supplements. The complexity, variability in dose and formulation, and lack of data for these herbal compounds make it difficult to assess their efficacy and safety. This review examines the evidence for the antimicrobial activity, safety, and drug-drug interactions of 18 herbal supplements that patients commonly use for treatment of persistent symptoms attributed to Lyme disease. The research team performed a narrative review by searching the PubMed, Embase, Scopus, Natural Medicines databases, and NCCIH website. The search used the keywords for 18 herbal compounds: (1) andrographis (Andrographis paniculate), (2) astragalus (Astragalus propinquus), (3) berberine, (4) cat's claw bark (Uncaria tomentosa), (5) cordyceps (Cordy

    Observational StudyPubMedLow Quality

Animal Studies(1)

Preclinical animal research — not a substitute for human evidence.

Low Quality
  • Integrating serum pharmacochemistry and metabolomics to reveal the potential effective ingredients and mechanism of Huangqi Chifeng Tang intervening carotid atherosclerosis.

    Liang Y, Liu J, Zhang C, Cheng J, Lu F, Chen P · Journal of ethnopharmacology · 2025

    As a representative herbal formula in traditional Chinese medicine (TCM), Huangqi ChiFeng Tang (HQCFT) is composed of Astragalus membranaceus (Fisch.) Bunge, Paeonia lactiflora Pall., and Saposhnikovia divaricata (Turcz.) Schischk. It has been clinically employed for managing carotid atherosclerosis (CAS) through its multi-component synergistic therapeutic effects. However, the material basis and mechanism of its pharmacological effects have not been systematically elucidated. To systematically elucidate the pharmacological substance basis and mechanism of action of HQCFT intervention in CAS. Experiments were performed with high fat and high cholesterol diet (HFHCD) and carotid artery ligation induced CAS rats. Identification of chemical components of HQCFT and blood components after oral administration in rats using UPLC-Q-Exactive Orbitrap/MS technology. Non-targeted metabolomics was used to analyze the metabolite profile of rat serum after HQCFT intervention. In vivo anti-CAS effe

    Animal StudyPubMedLow Quality

Limitations: The primary limitation is the absence of specific scientific studies provided to support any health claims. Without peer-reviewed research, it is not possible to assess efficacy, optimal dosages, or potential side effects with scientific rigor. Most information available is derived from traditional medicine practices, which, while valuable, do not meet the standards of modern evidence-based medicine.

This page is educational. Statements use phrases like "may support" and "has been studied for"because no remedy here is approved to cure, treat, or reverse any condition. Discussion happens on the ailment pages — community statistics here are derived from those reports. Always consult a qualified clinician.

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