Achyranthes

Botanical

What is it

Achyranthes refers to herbs in the genus Achyranthes, most notably A. bidentata (niu xi in TCM) and A. aspera (Ayurvedic apamarga). The roots are used traditionally for joint and circulatory complaints, and as a diuretic.

Evidence for 1 use

AI-assisted evidence assessment — talk to your doctor before relying on any single supplement.

Joint health (traditional)

Mixed Evidence

Long traditional use within multi-herb formulas; single-herb clinical evidence is sparse.

How it works

The root contains saponins (oleanolic acid derivatives, ginsenoside-Ro), phytoecdysteroids (ecdysterone), and polysaccharides. Animal studies show anti-inflammatory, immunomodulatory, and chondroprotective effects, often attributed to the saponins. Ecdysterone has independent literature for muscle effects. Human clinical evidence as a single herb is limited; in TCM, niu xi is typically combined with other herbs.

Dosage

No RDA. Traditional TCM doses are 6-15 g of dried root in decoction per day. Standardized extracts vary.

When and how to take it

No timing baseline established. Traditional decoctions are taken twice daily.

2 commercial forms

Compare the main delivery options and what they’re best suited for.

Dried root/decoction

Used in TCM and Ayurveda.

Traditional preparation.

Standardized extract

Modern supplement form.

May be standardized to ecdysterone.

Safety

Generally well tolerated in traditional doses. Long-term modern safety data are limited.

Who should be cautious

Pregnancy: traditionally contraindicated due to potential uterine effects. Lactation: insufficient data.

Interactions

Theoretical interactions with anticoagulants and antihypertensives. Not well characterized clinically.

Frequently asked questions

What is niu xi used for in TCM?⌄

It is considered to invigorate blood, support joints (especially lower body), and act as a mild diuretic. It is typically combined with other herbs.

Is it safe in pregnancy?⌄

No, it is traditionally avoided in pregnancy.

References

Achyranthes on Wikidata — Wikidata link

Achyranthes on NIH DSLD (US supplement label database) — NIH Dietary Supplement Label Database link

Research on Achyranthes (PubMed search) — PubMed link

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Evidence-based·How we grade evidence

Disclaimer: These statements have not been evaluated by the FDA. This page is educational, not a substitute for personalized medical advice. Evidence grades are AI-assisted assessments — talk to your doctor before starting any new supplement, especially if you’re pregnant, breastfeeding, on medications, or managing a chronic condition.