Asian Bayberry

Botanical

What is it

Asian bayberry (Myrica nagi or Myrica rubra) is a tree native to East and South Asia. The bark and fruit are used in traditional Ayurvedic and East Asian medicine for digestive complaints, fever, and inflammation.

Evidence for 1 use

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

Diarrhea / digestive support (traditional use)

Mixed Evidence

Traditional Ayurvedic and East Asian use for digestive complaints. Modern clinical evidence is sparse.

How it works

Asian bayberry bark contains tannins, flavonoids, and triterpenes. Laboratory studies suggest antimicrobial, anti-inflammatory, and astringent activity. Traditional uses include diarrhea, cough, and topical applications for skin and gum complaints. Human clinical evidence is limited; most knowledge comes from traditional use and laboratory studies of isolated compounds.

Dosage

No established RDA. Traditional doses are 1-3 g of bark powder daily, or proportional doses of standardized extracts.

When and how to take it

WHEN: 2-3 times daily during use. HOW: With water; separate from iron-containing supplements.

2 commercial forms

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

Bark powder

Whole bark dried and ground.

Traditional preparation.

Standardized extract

Modern supplement form.

More consistent active compound delivery.

Safety

Generally safe at traditional doses for short-term use. Side effects can include GI upset; tannin content may cause constipation with overuse.

Who should be cautious

Limited safety data in pregnancy and breastfeeding. Use cautiously with iron deficiency anemia. Discuss with a clinician.

Interactions

Tannins may reduce absorption of iron, certain minerals, and some medications.

Frequently asked questions

Is Asian bayberry the same as bayberry (Myrica cerifera)?⌄

They are related species in the same genus but distinct herbs with different traditional uses and chemistry. M. cerifera is North American; M. nagi/rubra are Asian.

References

Asian Bayberry on Wikidata — Wikidata link

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

Research on Asian Bayberry (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.