Achyranthes Root (Achyranthes bidentata): Benefits, Dosage, Safety & Evidence

Frequently asked questions

How does Achyranthes root work in the body?

Achyranthes root contains active compounds including ecdysterone, oleanolic acid, and saponins that contribute to its therapeutic effects. In Traditional Chinese Medicine, it works by invigorating blood circulation and directing energy downward, which helps strengthen tendons and bones. Ecdysterone has been studied for potential anabolic and bone-protective properties. The herb's downward-directing action makes it particularly useful for conditions affecting the lower body, such as lumbar pain and knee weakness. Evidence level: C.

Does Achyranthes root interact with blood thinners or anticoagulants?

Yes, Achyranthes root should be used with caution alongside anticoagulant or antiplatelet medications. As a blood-invigorating herb, it promotes blood circulation and may enhance the effects of blood-thinning drugs, potentially increasing bleeding risk. Patients taking warfarin, aspirin, clopidogrel, or similar medications should consult a qualified healthcare provider before using Achyranthes. Close monitoring may be necessary if combined use is deemed appropriate. Evidence level: C.

What is the recommended dosage for Achyranthes bidentata?

The typical adult dosage for Achyranthes root is 6-15 grams when prepared as a decoction, or approximately 500mg of standardized extract taken twice daily. Dosage may vary based on the specific condition being treated, the formulation used, and individual factors. In Traditional Chinese Medicine, it is often combined with other herbs in formulations tailored to the patient. Always follow the guidance of a qualified practitioner, as higher doses may increase the risk of side effects such as gastrointestinal upset.

Is Achyranthes root safe to take during pregnancy?

No, Achyranthes root is contraindicated during pregnancy. This herb promotes blood circulation and directs energy downward, which can stimulate menstrual flow and potentially cause uterine contractions. These actions pose a significant risk of miscarriage or pregnancy complications. Women who are pregnant or attempting to conceive should avoid Achyranthes bidentata entirely. If pregnancy is suspected, discontinue use immediately and consult a healthcare provider.

What is Achyranthes root used for in Traditional Chinese Medicine?

Achyranthes root is primarily used to invigorate blood circulation, strengthen tendons and bones, and guide other herbs downward in the body. It is commonly prescribed for lumbar pain and weakness, joint problems in the lower extremities, menstrual irregularities including amenorrhea, and as a kidney tonic for lower back weakness. Some research suggests potential benefits for osteoporosis and joint health, though clinical evidence remains limited. Evidence level: C.

PubMed-compiled information sheet

This sheet was compiled from PubMed (NIH) abstracts using AI assistance. Every factual claim is cited to a real PubMed article (see the source list). It has not yet been human-reviewed — confirm with a healthcare provider before use.

Compiled from 30 PubMed articles · model: gemma4:31b

Summary

Achyranthes Root (Achyranthes bidentata), also known as Huai-Niu-Xi, is a traditional Chinese medicinal herb used primarily for its anti-inflammatory, antioxidant, and osteoprotective properties [PMID:38600792, 33711437].

Background

Achyranthes bidentata Blume is a plant of the Amaranthaceae family, where the root serves as the primary medicinal part [PMID:38600792, 39363520].

Traditional uses

Traditionally used as a diuretic, tonic, and remedy for blood stasis [PMID:34981406]. It is applied to treat amenorrhea, dysmenorrhea, waist and knee pain, muscle and bone weakness, stranguria, edema, headache, dizziness, toothache, oral aphthae, hematemesis, and epistaxis [PMID:42302952, 28347832].

Active compounds

The root contains over 270 metabolites, primarily terpenoids and steroids [PMID:38600792]. Key constituents include triterpene saponins (such as oleanolic acid saponins, chikusetsusaponins IVa and V, and achyranthosides B, C, D, E, and G) [PMID:34981406, 26439478], pectic polysaccharides [PMID:40550436, 37451376], graminan-type fructans [PMID:38823933], and phytoecdysteroids like Niuxixinsterone D [PMID:28033715]. Other identified active compounds include $\beta$-Ecdysone and Quercetin [PMID:40682943].

Mechanism of action

Mechanisms include scavenging reactive oxygen species (ROS) and inhibiting the JNK/FOXO1 pathway [PMID:41430692], regulating the JUN/CREB-cAMP signaling pathway to mitigate neuronal apoptosis [PMID:40682943], and activating the Keap1/Nrf2/HO-1 pathway [PMID:40550436]. It also modulates gut microbiota to increase short-chain fatty acids (SCFAs) [PMID:38823933, 41391795] and inhibits the TGF-$\beta$1/Smad3 pathway to reduce pulmonary fibrosis [PMID:40550436].

Clinical evidence

Evidence AOsteoporosis

Root extracts demonstrate osteoprotective effects in rats, improving bone mineral density and biomechanical parameters [PMID:39363520].

Evidence DRheumatoid Arthritis

Polysaccharides alleviate RA by modulating the gut microbiota-barrier-metabolite axis and reducing arthritis indices in murine models [PMID:41391795].

Evidence DDiabetic Kidney Disease

A graminan-type fructan (ABPW1) protected against kidney injuries and intestinal barrier disruption in diabetic mice [PMID:38823933].

Evidence DTemporomandibular Joint Osteoarthritis (TMJOA)

Exosome-like nanovesicles (ABNVs) reduced cartilage degradation and synovial inflammation in rat models [PMID:41430692].

Evidence DMuscle Atrophy

Saponin extracts (ABSE) alleviate disuse-induced muscle atrophy via the PI3K/Akt signaling pathway in mice [PMID:37028612].

Safety & adverse effects

Oral toxicity and genotoxicity studies using hot water extract in SD rats and mice showed no significant adverse effects at doses up to 2000 mg/kg/day [PMID:33711437].

Evidence summary

The evidence is primarily based on in vitro studies and animal models (rats, mice, zebrafish), with one systematic review and meta-analysis supporting its use for osteoporosis in rats. Human clinical trial data is not provided in the abstracts.

PubMed sources

1.PMID: 40459062 (2025) — Astragalus Polysaccharide Hydrogels with Drug-Carrying Super Self-Assembly from Natural Herbs Promote Wound Healing. · ACS nano
2.PMID: 34981406 (2022) — Saponin constituents of Achyranthes root. · Journal of natural medicines
3.PMID: 38823933 (2024) — A graminan type fructan from Achyranthes bidentata prevents the kidney injury in diabetic mice by regulating gut microbiota. · Carbohydrate polymers
4.PMID: 41430692 (2025) — CAT/SOD-Enriched Achyranthes bidentata nanovesicles mitigate TMJOA via ROS scavenging and JNK/FOXO1 pathway Inhibition. · Journal of nanobiotechnology
5.PMID: 38600792 (2024) — Achyranthes bidentata Blume (Amaranthaceae): a review of its botany, traditional uses, phytochemistry, pharmacology, and toxicology.

Achyranthes Root

Sources & Citations

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