Asarum heterotropoides

Botanical

What is it

Asarum heterotropoides (xi xin in Chinese) is a wild ginger species used in traditional Chinese medicine. It contains aristolochic acid in small amounts, which is a known nephrotoxin and carcinogen.

How it works

Asarum species contain essential oils with methyl eugenol, asarone, and other compounds, plus trace amounts of aristolochic acid. Traditional use targets cold-pattern pain, sinus congestion, and respiratory symptoms. The presence of aristolochic acid is a significant safety concern. Aristolochic acid causes irreversible kidney damage (aristolochic acid nephropathy) and increases urothelial cancer risk even at low chronic exposures. Many regulatory authorities restrict or warn against aristolochic-acid-containing herbs.

Dosage

Traditional dosing is 1 to 3 g per day, intentionally kept low due to toxicity. Modern use is increasingly discouraged because of aristolochic acid content.

When and how to take it

There is no consumer-safe timing guidance. This herb is not recommended for self-administration.

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Asarum heterotropoides (xi xin)

Used in traditional Chinese medicine. Modern regulators warn against use due to aristolochic acid toxicity.

Contains trace aristolochic acid; restricted in many jurisdictions.

Safety

Reported risks include kidney injury, kidney failure, and urothelial cancer from aristolochic acid exposure. Acute toxicity at higher doses can cause cardiac arrhythmias and central nervous system effects.

Who should be cautious

Avoid entirely in pregnancy, breastfeeding, kidney disease, and history of cancer. Many countries have banned or restricted Asarum products due to aristolochic acid content.

Interactions

Should not be combined with other kidney-stressing medications (NSAIDs, certain antibiotics, contrast dye). Aristolochic-acid content makes long-term combination with any drug risky.

Frequently asked questions

Is Asarum heterotropoides safe?⌄

No. It contains aristolochic acid, which causes irreversible kidney damage and increases urothelial cancer risk. Many countries have banned aristolochic-acid-containing herbs.

What is xi xin used for?⌄

Traditional Chinese medicine uses it for cold-pattern pain and sinus symptoms. Safer alternatives exist for all such uses.

References

Asarum heterotropoides on Wikidata — Wikidata link

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

Research on Asarum heterotropoides (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.