# Kawakawa (Piper excelsum)

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/kawakawa
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-03-19
**Evidence Score:** 4 / 10
**Category:** Pacific Islands
**Also Known As:** Piper excelsum, New Zealand pepper tree, Māori pepper, Kawakawa pepper, NZ kava, Macropiper excelsum

## Overview

Kawakawa (Piper excelsum) is a traditional Māori medicinal plant containing bioactive compounds including myristicin, piperine, and flavonoids. These phenylpropanoid and alkaloid compounds may support traditional therapeutic applications, though clinical evidence remains limited.

## Health Benefits

• Traditional therapeutic use by Māori people (traditional evidence only)
• Contains bioavailable compounds including myristicin, piperine, and flavonoids confirmed through human [metabolism](/ingredients/condition/weight-management) studies (PMID: 38389156 - preliminary evidence)
• Phenylpropanoid and alkaloid content similar to other medicinal plants (analytical evidence only)
• Phase 1 and 2 metabolism patterns suggest general tolerability (preliminary metabolic evidence)
• No clinical therapeutic benefits established in human trials

## Mechanism of Action

Kawakawa's primary bioactive compounds include myristicin, which may modulate hepatic [phase II detox](/ingredients/condition/detox)ification enzymes, and piperine, which can inhibit cytochrome P450 enzymes and enhance bioavailability of other compounds. The flavonoid content may contribute to antioxidant activity through [free radical scaveng](/ingredients/condition/antioxidant)ing pathways. Phenylpropanoid compounds likely interact with [inflammatory](/ingredients/condition/inflammation) mediators, though specific receptor binding data is limited.

## Clinical Summary

Current clinical evidence for kawakawa is extremely limited, with only preliminary human [metabolism](/ingredients/condition/weight-management) studies (PMID: 38389156) confirming bioavailability of key compounds like myristicin and piperine. No randomized controlled trials have evaluated therapeutic efficacy in humans. Traditional use evidence from Māori practices spans centuries but lacks quantified outcomes or standardized preparations. Further clinical research is needed to validate traditional therapeutic claims.

## Nutritional Profile

{"macronutrients": {"fiber": "Approximately 2.5g per 100g of leaves", "protein": "Approximately 3g per 100g of leaves"}, "micronutrients": {"vitamins": {"Vitamin C": "Approximately 12mg per 100g of leaves"}, "minerals": {"Calcium": "Approximately 150mg per 100g of leaves", "Potassium": "Approximately 450mg per 100g of leaves"}}, "bioactive_compounds": {"myristicin": "Concentration not specified, but bioavailable", "piperine": "Concentration not specified, but bioavailable", "flavonoids": "Concentration not specified, but bioavailable", "phenylpropanoids": "Concentration not specified", "alkaloids": "Concentration not specified"}, "bioavailability_notes": "Bioactive compounds such as myristicin, piperine, and flavonoids have been confirmed to be bioavailable through human [metabolism](/ingredients/condition/weight-management) studies."}

## Dosage & Preparation

No clinically studied dosage ranges are available as human therapeutic trials have not been conducted. Traditional preparation involves aqueous extraction (tea) or concentrated extracts, but therapeutic doses have not been established. Consult a healthcare provider before starting any new supplement.

## Safety & Drug Interactions

Safety data for kawakawa supplementation is minimal, with no established adverse effect profile in clinical literature. The piperine content may theoretically enhance absorption of medications by inhibiting cytochrome P450 enzymes, potentially altering drug [metabolism](/ingredients/condition/weight-management). Myristicin in high concentrations has shown hepatotoxic potential in animal studies, though relevance to typical kawakawa use is unclear. Pregnancy and breastfeeding safety has not been established through clinical research.

## Scientific Research

No human clinical trials, RCTs, or meta-analyses evaluating therapeutic outcomes have been conducted. One study (PMID: 38389156) examined human [metabolism](/ingredients/condition/weight-management) and excretion of kawakawa leaf compounds after consumption, confirming bioavailability but not assessing clinical endpoints or efficacy.

## Historical & Cultural Context

Kawakawa has a history of therapeutic use by Māori in Aotearoa New Zealand, commonly consumed as a beverage (tea) and incorporated into functional foods. It represents an important plant in Māori traditional medicine, though specific historical indications are not quantified in available research.

## Synergistic Combinations

Black pepper, turmeric, ginger, kava, green tea

## Frequently Asked Questions

### What is kawakawa used for in traditional Māori medicine?

Kawakawa has been traditionally used by Māori people for various therapeutic purposes, though specific applications vary by region and preparation method. The leaves contain bioactive compounds including myristicin and piperine that have been confirmed in human metabolism studies.

### How much kawakawa should I take daily?

No standardized dosage for kawakawa supplements has been established through clinical research. Traditional preparations vary widely in concentration and bioactive content, making dosage recommendations difficult without proper standardization studies.

### Does kawakawa interact with prescription medications?

Kawakawa contains piperine, which may inhibit cytochrome P450 enzymes responsible for drug metabolism. This could theoretically alter the effectiveness or side effects of medications, though specific drug interactions have not been clinically documented.

### What are the active compounds in kawakawa?

Kawakawa contains several bioactive compounds including myristicin, piperine, and various flavonoids, as confirmed through human metabolism studies. These phenylpropanoid and alkaloid compounds are similar to those found in other medicinal Piper species.

### Is kawakawa safe for long-term use?

Long-term safety data for kawakawa supplementation is not available from clinical studies. While traditional use suggests general tolerability, the myristicin content may pose hepatotoxic risks in high concentrations, though relevance to typical use remains unclear.

### Is kawakawa safe during pregnancy and breastfeeding?

There is insufficient clinical evidence to establish the safety of kawakawa supplementation during pregnancy and breastfeeding. Due to the presence of alkaloids and phenylpropanoids in kawakawa, pregnant and nursing individuals should consult a healthcare provider before use. Traditional Māori use does not constitute modern safety data for these vulnerable populations.

### What is the difference between kawakawa leaf and kawakawa extract?

Kawakawa leaf (whole plant material) contains naturally occurring compounds in their native ratios, while kawakawa extract concentrates bioactive alkaloids and phenylpropanoids for higher potency per dose. Extract forms may have faster absorption due to reduced plant fiber content, though current research (PMID: 38389156) suggests both forms undergo similar Phase 1 and 2 metabolism pathways. Leaf preparations offer broader phytochemical profiles, whereas extracts provide standardized compound levels.

### What does current clinical research show about kawakawa's effectiveness?

Current research on kawakawa is primarily preliminary, with human metabolism studies confirming bioavailability of key compounds (myristicin, piperine, flavonoids) but limited clinical efficacy trials. Most evidence supporting kawakawa comes from traditional Māori use rather than modern randomized controlled studies. More robust clinical research is needed to establish efficacy for specific health conditions beyond traditional applications.

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