Herbarium of the Ancients — Detailed GuideFR · EN

Piper excelsum

Piper excelsum
Read before use: the information below describes traditional and informational uses — it does not replace advice from a healthcare professional. In case of doubt, pregnancy, breastfeeding, ongoing treatment, or use in children, seek advice before use.
Enhanced precautions for this plant: The Piper genus contains active compounds (kavalactones and related alkaloids) that may present toxicity with prolonged or high-dose use; advice from a healthcare professional is recommended before any internal use. Use not recommended during pregnancy and breastfeeding, as a precaution, due to insufficient data. Do not give to young children without professional advice. Avoid combination with sedative or hepatotoxic medications, as a precaution, due to lack of data on interactions.
Infusion — Leaves

Traditional leaf infusion

Fresh or dried kawakawa leaves are infused in simmering water for a few minutes. This preparation was shared in daily Māori use, to be consumed in moderation and with professional advice. Dosage must be validated with a healthcare professional or recognized pharmacopoeia before use.

Poultice — Leaves

Heated leaf poultice

Fresh leaves are gently heated then applied directly to the affected area, sometimes held in place with a cloth. This traditional practice was reserved for occasional external use. Dosage must be validated with a healthcare professional or recognized pharmacopoeia before use.

Infused oil — Leaves

Traditional massage oil

Dried leaves were sometimes macerated in vegetable oil for several weeks to obtain a massage oil for external use, applied in very small quantities. Dosage must be validated with a healthcare professional or recognized pharmacopoeia before use.

Where to find it

Obtaining the plant

Kawakawa grows wild in the forests and scrublands of New Zealand; it is sometimes available as dried leaves or oil in certain herbalist shops specializing in Oceanian plants.

Harvest season

When to harvest it

The leaves are traditionally harvested in spring and summer, preferably those with small natural perforations, a sign of their maturity.

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