Plant Profile

Astragalus

Astragalus membranaceus
Family: Fabaceae  ·  Parts used: Root  ·  Also known as: Huang qi, Milkvetch root, Mongolian milkvetch

The complete database record: 3 documented constituents, 6 pharmacological actions, 10 traditional / indicated uses, with 19 cited sources.

Botanical Description

Erect perennial herb with a long, fibrous, pale yellow taproot. The leaves are pinnately compound with numerous small, oval leaflets, giving a soft, ferny appearance. Small, pale yellow, pea-like flowers are borne in loose axillary clusters (racemes), followed by membranous, inflated seed pods that give the species its name.[5]

Height: 40-100 cm
Habit: Erect perennial herb
Leaves: Pinnately compound with numerous small, oval leaflets
Flowers: Small, pale yellow, pea-like flowers in loose axillary racemes
Stem: Erect, softly hairy
Root: Long, fibrous, pale yellow taproot (the medicinal part, huang qi)
Fruit: Membranous, inflated seed pod
Flowering Period: June-July

Habitat & Distribution

Native to the grasslands, sunny slopes and forest margins of northern and north-eastern China, Mongolia and parts of Korea; widely cultivated as a medicinal crop across East Asia.[5]

Harvesting

The root is dug from plants at least four years old, typically in spring or autumn, then cleaned and dried, often sliced into the characteristic pale, fibrous 'coin' slices used in traditional decoctions.[5]

Parts: Root
Season: Spring or autumn, from four-year-old (or older) plants

Key Constituents

Astragalus polysaccharides (APS)[11]

Principal immunomodulatory constituents.

Polysaccharides
Cycloartane triterpenoid saponins (astragaloside IV)[5]

Major bioactive saponin with cardio-, neuro-, hepato- and renoprotective effects.

Saponins
Isoflavonoids (calycosin, formononetin)[5]

Antioxidant flavonoid constituents of the root.

Flavonoids

Pharmacological Actions

Adaptogen[5, 10]

Adaptogenic tonic for fatigue and low vitality (traditional 'Qi' tonic)

Anti-inflammatory[2, 5, 7]

Antioxidant and anti-inflammatory

Anticancer (preclinical)[2, 5, 11, 16, 17, 18]

Astragalus membranaceus and its constituents (astragaloside IV, cycloastragenol, Astragalus polysaccharide) inhibit tumour growth, invasion and metastasis and enhance antitumour immunity across lung, colorectal and gastrointestinal cancers (preclinical, incl. in vivo).

Antioxidant[4, 5, 9]

Antioxidant and anti-inflammatory

Immunomodulator / immune support[2, 4, 5, 6, 11, 12, 13]

Immune support / immunomodulation (activates macrophages, NK cells, T and B lymphocytes)

Nephroprotective (kidney support)[5, 19]

Renoprotective (kidney support) - as an adjunct in chronic kidney disease, reduced proteinuria and raised haemoglobin and serum albumin across trials (Cochrane review; study quality low)

Traditional & Indicated Uses

Arthritis / joint pain[5]Preliminary · 1/10

inferred from anti-inflammatory action

Evidence: 1
Label: Arthritis / joint pain

more plants for arthritis / joint pain →detailed sources →

Cancer (anticancer research)[2, 5, 11, 16, 17, 18]Preliminary · 2/10

Astragalus membranaceus protects against gastrointestinal cancers; astragaloside IV inhibits lung cancer metastasis via macrophage repolarization, cycloastragenol boosts CD8+ T-cell antitumour immunity (with anti-PD-1 synergy), and Astragalus polysaccharide suppresses inflammation-induced colorectal cancer (preclinical).

Evidence: 2
Label: Cancer (anticancer research)

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Cold & flu[11]Preliminary · 2/10

Supports resistance to colds and respiratory infection (immune)

Mechanistic Exclude Ids: REF-2263
Evidence: 2
Label: Cold & flu

more plants for cold & flu →detailed sources →

Fatigue / low energy[5]Preliminary · 1/10

Adaptogenic tonic for fatigue and low vitality (traditional 'Qi' tonic)

Evidence: 1
Label: Fatigue / low energy

more plants for fatigue / low energy →detailed sources →

Immune support[5, 11]Preliminary · 2/10

Immune support / immunomodulation (activates macrophages, NK cells, T and B lymphocytes); Supports resistance to colds and respiratory infection (immune)

Evidence: 2
Label: Immune support

more plants for immune support →detailed sources →

Infection (general)[11]Preliminary · 2/10

Supports resistance to colds and respiratory infection (immune)

Evidence: 2
Label: Infection (general)

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Inflammation (general)[5]Preliminary · 1/10

inferred from anti-inflammatory action

Evidence: 1
Label: Inflammation (general)

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Kidney support[5, 19]Good · 7/10

Renoprotective (kidney support) - as an adjunct in chronic kidney disease, reduced proteinuria and raised haemoglobin and serum albumin across trials (Cochrane review; study quality low)

Evidence: 7
Label: Kidney support

more plants for kidney support →detailed sources →

Skin irritation[5]Preliminary · 1/10

inferred from anti-inflammatory action

Evidence: 1
Label: Skin irritation

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Stress[5]Preliminary · 1/10

inferred from adaptogen action

Mechanistic Exclude Ids: REF-2261
Evidence: 1
Label: Stress

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Traditional Use & History

Astragalus root (huang qi) is one of the most widely used tonic herbs in traditional Chinese medicine, classified as a 'Qi tonic' for fatigue, low vitality and reduced resistance to colds and infections, and used to support immune, cardiovascular and kidney health.[5, 11]

Preparations

Decoction[5]

Dried, sliced root simmered in water, often alongside other tonic herbs, as the classic traditional Chinese medicine preparation.

Standardised extract[5, 11]

Concentrated extract standardised to polysaccharide or astragaloside IV content, taken as capsules or tablets.

Dosage

Decoction[15]

The WHO monograph on Radix Astragali gives doses of 3-9 g per day. Traditional Chinese medicine references often cite a considerably higher 9-30 g of dried root per day; WHO's figure is the conservative regulatory-tier one and is stated here in preference. Educational reference only, not a prescription.

Standardised extract[11]

Clinical studies commonly use extracts providing the equivalent of several grams of dried root daily, in divided doses. Educational reference only, not a prescription.

Safety, Cautions & Contraindications

Safety note[11]Info

Astragalus stimulates immune activity; on theoretical grounds it should be used cautiously in autoimmune disease and with immunosuppressant medicines (for example after organ transplant) - discuss with a clinician.

Safety note[5]Info

Generally well tolerated; high-quality long-term human safety and toxicity data remain limited.

Safety note[5]Caution

Safety in pregnancy and breastfeeding has not been established; avoid medicinal doses.

Harvest Readiness

[14]

Part: root
Signals: Dig the root in autumn from four-year-old (or older) plants; the mature multi-year root is the part used.
Basis: traditional
Source Quote: The root of 4 year old plants is harvested in the autumn and dried for later use
Species Confirmed: 1
Notes: Useful Temperate Plants (REF-3212) for Astragalus mongholicus (accepted name; A. membranaceus is a synonym). Single source -> provisional.

External Identifiers

References & Sources

  1. Xu, B., Huang, J.P., Peng, G., Cao, W., Liu, Z. et al (2024) 'Total biosynthesis of the medicinal triterpenoid saponin astragalosides', Nature Plants, 10(11), pp. 1826-1837. doi:10.1038/s41477-024-01827-4 Preclinical
    https://doi.org/10.1038/s41477-024-01827-4
  2. Auyeung, K.K., Han, Q.B. and Ko, J.K (2016) 'Astragalus membranaceus: A Review of its Protection Against Inflammation and Gastrointestinal Cancers', The American Journal of Chinese Medicine, 44(1), pp. 1-22. doi:10.1142/S0192415X16500014 Traditional / reference
    https://doi.org/10.1142/S0192415X16500014
  3. Zhang, Y., Ji, W., Qin, H., Chen, Z., Zhou, Y. et al (2024) 'Astragalus polysaccharides alleviate DSS-induced ulcerative colitis in mice by restoring SCFA production and regulating Th17/Treg cell homeostasis in a microbiota-dependent manner', Carbohydrate Polymers, 349, pp. 122829. doi:10.1016/j.carbpol.2024.122829 Preclinical
    https://doi.org/10.1016/j.carbpol.2024.122829
  4. Fu, J., Wang, Z., Huang, L., Zheng, S., Wang, D., Chen, S., Zhang, H. and Yang, S (2014) 'Review of the botanical characteristics, phytochemistry, and pharmacology of Astragalus membranaceus (Huangqi)', Phytotherapy Research, 28(9), pp. 1275-1283. doi:10.1002/ptr.5188 Meta-analysis / review
    https://doi.org/10.1002/ptr.5188
  5. Zhang, J., Wu, C., Gao, L., Du, G. and Qin, X (2019) 'Astragaloside IV derived from Astragalus membranaceus: A research review on the pharmacological effects', Advances in Pharmacology. doi:10.1016/bs.apha.2019.08.002 Traditional / reference
    https://doi.org/10.1016/bs.apha.2019.08.002
  6. Dong, M., Li, J., Yang, D., Li, M. and Wei, J (2023) 'Biosynthesis and pharmacological activities of flavonoids, triterpene saponins and polysaccharides derived from Astragalus membranaceus', Molecules, 28(13), pp. 5018. doi:10.3390/molecules28135018 Meta-analysis / review
    https://doi.org/10.3390/molecules28135018
  7. Chen, G., Jiang, N., Zheng, J., Hu, H., Yang, H., Lin, A., Hu, B. and Liu, H (2023) 'Structural characterization and anti-inflammatory activity of polysaccharides from Astragalus membranaceus', International Journal of Biological Macromolecules, 241, pp. 124386. doi:10.1016/j.ijbiomac.2023.124386 Preclinical
    https://doi.org/10.1016/j.ijbiomac.2023.124386
  8. Zheng, Q., Zhuang, Z., Wang, Z., Deng, L., Jin, W., Huang, Z., Zheng, G. and Wang, Y (2020) 'Clinical and preclinical systematic review of Astragalus membranaceus for viral myocarditis', Oxidative Medicine and Cellular Longevity, 2020, pp. 1560353. doi:10.1155/2020/1560353 Meta-analysis / review
    https://doi.org/10.1155/2020/1560353
  9. Dai, Y., Wang, Y., Kang, Q., Wu, Y., Liu, Y., Su, Y., Wang, X., Xiu, M. and He, J (2024) 'The protective effect and bioactive compounds of Astragalus membranaceus against neurodegenerative disorders via alleviating oxidative stress in Drosophila', FASEB Journal, 38(13), pp. e23727. doi:10.1096/fj.202400390R Preclinical
    https://doi.org/10.1096/fj.202400390R
  10. Xu, L., Xu, X., Hou, X., Wang, F., Gao, S. and Zhang, H (2019) 'Adjuvant therapy with Astragalus membranaceus for post-stroke fatigue: a systematic review', Metabolic Brain Disease, 35(1), pp. 83-93. doi:10.1007/s11011-019-00483-4 Meta-analysis / review
    https://doi.org/10.1007/s11011-019-00483-4
  11. Li, C.X., Liu, Y., Zhang, Y.Z., Li, J.C. and Lai, J (2022) 'Astragalus polysaccharide: a review of its immunomodulatory effect', Archives of Pharmacal Research. doi:10.1007/s12272-022-01393-3 Preclinical
    https://doi.org/10.1007/s12272-022-01393-3
  12. Jin, M., Zhao, K., Huang, Q. and Shang, P (2014) 'Structural features and biological activities of the polysaccharides from Astragalus membranaceus', International Journal of Biological Macromolecules, 64, pp. 257-266. doi:10.1016/j.ijbiomac.2013.12.002 Preclinical
    https://doi.org/10.1016/j.ijbiomac.2013.12.002
  13. Liu, Y. and Lv, W (2019) 'Research progress in Astragalus membranaceus and its active components on immune responses in liver fibrosis', Chinese Journal of Integrative Medicine, 26(10), pp. 794-800. doi:10.1007/s11655-019-3039-1 Meta-analysis / review
    https://doi.org/10.1007/s11655-019-3039-1
  14. Fern, Ken 'Astragalus mongholicus (syn. membranaceus, Huang Qi) — Useful Temperate Plants'. Available at: https://temperate.theferns.info/plant/Astragalus+mongholicus Traditional / reference
    https://temperate.theferns.info/plant/Astragalus+mongholicus
  15. World Health Organization (1999) 'Radix Astragali'. Available at: https://iris.who.int/items/6418d8af-5200-4e6b-9bf5-004f3aa62a37 Traditional / reference
    https://iris.who.int/items/6418d8af-5200-4e6b-9bf5-004f3aa62a37
  16. Xu, F. and Cui, W.-Q. and Wei, Y. and Cui, J. and Qiu, J. and Hu, L.-L. and Gong, W.-Y. and Dong, J.-C. and Liu, B.-J (2018) 'Astragaloside IV inhibits lung cancer progression and metastasis by modulating macrophage polarization through AMPK signaling', Journal of Experimental & Clinical Cancer Research, 37(1), pp. 207. doi:10.1186/s13046-018-0878-0 Preclinical
    https://doi.org/10.1186/s13046-018-0878-0
  17. Deng, G. and Zhou, L. and Wang, B. and Sun, X. and Zhang, Q. and Chen, H. and Wan, N. and Ye, H. and Wu, X. and Sun, D. and Sun, Y. and Cheng, H (2022) 'Targeting cathepsin B by cycloastragenol enhances antitumor immunity of CD8 T cells via inhibiting MHC-I degradation', Journal for ImmunoTherapy of Cancer, 10(10), pp. e004874. doi:10.1136/jitc-2022-004874 Preclinical
    https://doi.org/10.1136/jitc-2022-004874
  18. Li, Q. and Zhang, C. and Xu, G. and Shang, X. and Nan, X. and Li, Y. and Liu, J. and Hong, Y. and Wang, Q. and Peng, G (2024) 'Astragalus polysaccharide ameliorates CD8 T cell dysfunction through STAT3/Gal-3/LAG3 pathway in inflammation-induced colorectal cancer', Biomedicine & Pharmacotherapy, 171, pp. 116172. doi:10.1016/j.biopha.2024.116172 Preclinical
    https://doi.org/10.1016/j.biopha.2024.116172
  19. Zhang, H.W., Lin, Z.X., Xu, C., Leung, C. and Chan, L.S (2014) 'Astragalus (a traditional Chinese medicine) for treating chronic kidney disease', Cochrane Database of Systematic Reviews. doi:10.1002/14651858.CD008369.pub2 Meta-analysis / review
    https://doi.org/10.1002/14651858.CD008369.pub2

This fact sheet is generated automatically from the Omnia Sana plant database and reflects its latest synced data. It is provided for educational purposes only and is not medical advice. How this site is built.

Selected studies & references

Educational use only. This profile summarises traditional and scientific sources for reference. It is not medical advice and not a substitute for a qualified practitioner. Some plants carry safety cautions and drug interactions - always check before use.
This profile is assembled automatically from the Omnia Sana plant database, which we curate by hand. How this site is built.
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