Aster tataricus

Botanical

What is it

Aster tataricus (Tatarian aster, Zi Wan in Chinese) is a perennial flowering plant native to East Asia. The root is used in traditional Chinese medicine, primarily as an expectorant for cough and respiratory complaints.

Evidence for 1 use

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

Cough / respiratory support

Mixed Evidence

Strong traditional TCM use; modern Western clinical evidence is limited.

How it works

Aster tataricus root contains triterpenoid saponins (asterin, astersaponins), epifriedelinol, peptides (astins), and shionone. These compounds have demonstrated expectorant, antitussive, anti-inflammatory, and possibly antitumor activities in preclinical studies. In TCM, Zi Wan is classified as warming and moistening, often used in combinations for cough with phlegm. Modern clinical evidence in Western populations is limited.

Dosage

TCM traditional: 6-15 g of dried root as decoction. Often used in combinations rather than alone.

When and how to take it

Traditional TCM cough preparations taken multiple times daily during acute illness.

1 commercial form

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

Dried root (Zi Wan)

Used in herbal formulas for cough.

Traditional TCM preparation

Safety

Generally well tolerated at traditional doses. Some constituents (astins) have shown antiproliferative effects with potential for off-target toxicity at high doses. Long-term safety data are limited.

Who should be cautious

Avoid in pregnancy and lactation due to insufficient data. Use under TCM practitioner guidance for proper combination formulas.

Interactions

Limited interaction data. Theoretical interactions with cough/respiratory medications and immunosuppressants.

Frequently asked questions

What is Zi Wan used for?⌄

Primarily as a cough remedy with phlegm in traditional Chinese medicine. Often combined with other herbs.

Is Aster tataricus safe?⌄

At traditional doses for short courses, generally well tolerated. Use under qualified practitioner guidance.

References

Aster tataricus on Wikidata — Wikidata link

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

Research on Aster tataricus (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.