Aniseed myrtle

Other Names

Anetholea anisataAnise myrtleAniseed treeBackhousia anisataNative aniseRingwoodSyzygium anisatum

Synopsis

Aniseed Myrtle (Syzygium anisatum): A Comprehensive Reference

1. Identity and Botanical Description

1.1 Nomenclature and Taxonomy

Syzygium anisatum (formerly Backhousia anisata and Anetholea anisata) is an Australian rainforest tree with leaves that produce an essential oil with the characteristic aroma of aniseed. While many taxonomists have separated plants from their genera following DNA testing, this Backhousia has recently been added to the larger genus Syzygium; however, the NSW Herbarium considers it a separate genus altogether, Anetholea. All three synonyms — Syzygium anisatum, Backhousia anisata, and Anetholea anisata — may still be encountered in the scientific and commercial literature. Anise myrtle belongs to the Myrtaceae family, which includes eucalypt trees.

It is referred to as aniseed myrtle or anise myrtle in the trade; the fresh and dried leaves of this plant are used as a herb in culinary applications. Additional common names include ringwood and aniseed tree. Anise myrtle is valued for its peculiar aroma and licorice-like flavor.

1.2 Morphology and Natural Distribution

Syzygium anisatum is a rare rainforest tree native to New South Wales, Australia. Its aromatic leaves contain an essential oil profile comparable to true aniseed. The leaf from cultivated plantations is used as a bushfood spice and distilled for the essential oil. The ringwood tree has a dense crown and grows up to 45 m (148 ft) tall. The leaves are 6–12 cm (2.4–4.7 in) long with prominently undulated margins and a rich aniseed aroma when crushed. Flowers are white and sweetly scented, borne in panicles. The fruit are dry papery capsules around 5 mm (0.20 in) long and are white in appearance.

This strong aniseed-flavoured Australian bush herb grows in the subtropical rainforest areas of northern New South Wales in the wild. Originally the leaves were wild-harvested, but there have been great concerns over the environmental impact for these trees, and much of the wild harvest has now been replaced by commercial production. A significant fungal pathogen, myrtle rust (Austropuccinia), was detected in aniseed myrtle plantations in January 2011. Myrtle rust severely damages new growth and threatens aniseed myrtle production.

1.3 Chemotypes

Brophy and Boland (1991) reported that the yield of essential oil from anise myrtle varies from 1.3 to 2.0%, and the essential oil has two different chemotypes depending upon the content of anethole and methyl chavicol. The essential oil (anethole type) comprises 71.2–93.7% of (E)-anethole and 5.0–15.3% of methyl chavicol, whereas the essential oil (methyl chavicol type) contains 22.1–42.8% of (E)-anethole and 55.8–75% methyl chavicol.

The name "aniseed myrtle" was originally coined to specifically describe high-quality selections of the trans-anethole chemotype (90%+), generally recognized as safe for flavouring. These selections are propagated from cuttings for consistent essential oil quality. The aniseed myrtle selections are also low in methyl chavicol and cis-anethole (less than 0.1%).

1.4 Common Dosage Forms and Preparations

In trade, fresh and dried leaves of this plant are used as a herb in culinary applications. The essential oil is extracted by steam distillation of the leaves. Leaves may be used fresh or dried in tea, or ground up and added to bread dough, biscuits, stuffings, syrups, glazes, dressings, and meat dishes. Due to its distinctive flavor, it is widely used in biscuits, cakes, teas, beverages, syrups, and other food products. The essential oil also finds use in cosmetics and personal care products. As a dietary supplement, the leaf is available in dried/ground powder, tea, and liquid extract forms.

2. Traditional and Historical Use

Indigenous Australians have used anise myrtle for its medicinal values; in recent times it has been used as a flavoring agent by the food and beverage industry. The precise scope of traditional Aboriginal pharmacopoeia involving this plant is not extensively documented in the peer-reviewed literature.

Not much is known about the traditional use of this aromatic Australian bush herb other than that it was used for a calming effect on the stomach by the Aboriginal people of the area. Traditionally, it was made into a tonic which supposedly increased the vitality of the drinker. The leaf was prepared as a herbal infusion (tea), and the plant's aromatic leaves were also valued for their medicinal properties in this indigenous context. Its edible leaves are typically consumed fresh or dried and powdered, and were used traditionally as a medicinal tonic.

The plant belongs to the broader category of Australian "bush tucker" — traditional foods and medicines used by Aboriginal and Torres Strait Islander peoples — and its culinary and medicinal exploitation has expanded considerably only in recent decades through the commercial native foods industry. Well-known for its aromatics and its traditional use in medicinal tonics for its vitalising effects, anise myrtle is a native tree endemic to the subtropical rainforests of northern New South Wales. The leaves (Backhousia anisata), a traditional bush tucker spice, are not commonly found in the wild and are now commercially grown to meet growing demand.

3. Phytochemistry: Key Constituents and Active Compounds

3.1 Essential Oil Constituents

The essential oil is extracted by steam distillation of the leaves; the major aromatic volatile compound is anethole. trans-Anethole and methyl chavicol are the two principal components of the essential oil, imparting licorice and aniseed flavours respectively. The leaves contain 79.4 to 90% of (E)-anethole and 4.4 to 10.1% methyl chavicol.

Anethole is the major bioactive compound identified in Syzygium anisatum. Anethole belongs to the class of phenylpropanoid organic compounds and contributes a large component of the odor and flavor of anise and fennel (Apiaceae), anise myrtle (Myrtaceae), liquorice (Fabaceae), magnolia blossoms, and star anise (Schisandraceae). Anethole is only slightly soluble in water but exhibits high solubility in ethanol.

Minor essential oil constituents also include methyl eugenol, limonene, and linalool, though these occur in considerably smaller proportions than anethole and methyl chavicol in the high-quality anethole chemotype selections.

3.2 Phenolic and Non-Volatile Compounds

A 2024 study analyzed leaves of aniseed myrtle (Syzygium anisatum), lemon myrtle (Backhousia citriodora), and cinnamon myrtle (Backhousia myrtifolia) for their complex phytochemical profile and antioxidant potential using LC-ESI-QTOF-MS/MS, identifying 145 and quantifying/semi-quantifying 27 phenolic compounds across these Australian myrtles. Aniseed myrtle was quantified with the highest total phenolic content (TPC: 52.49 ± 3.55 mg GAE/g) and total antioxidant potential among the selected myrtles. Catechin, epicatechin, isovitexin, cinnamic acid, and quercetin were quantified as the most abundant phenolic compounds.

In an earlier study by Konczak et al. (Food Chemistry, 2010), Tasmannia pepper leaf, followed by anise myrtle and lemon myrtle, contained the highest levels of total phenolics (102.1, 55.9, and 31.4 mg gallic acid equivalents/g dry weight, respectively). Tasmanian pepper leaf, lemon myrtle, and anise myrtle had the highest antioxidant response among native Australian food plants, the source of which was concluded to have been cinnamic acids and flavonoids.

A comparison study of anise myrtle herbal infusion with commercial green tea found that the phytochemical profile, organic acid content, minerals, and various antioxidant parameters of anise myrtle infusions were compared with green tea (Camellia sinensis); total phenolic content and catechin derivatives were higher in green tea compared to indigenous herbal infusions, and no caffeine was found in the herbal infusions. Australian indigenous herbal infusions were a good source of calcium and magnesium compared to green tea. Gulban and anise myrtle infusions were notably rich in citric acid.

3.3 Mineral and Micronutrient Profile

Aniseed myrtle has a notably high antioxidant profile and is high in vitamin C, vitamin E, folate, lutein, zinc, calcium, magnesium, as well as chlorophyll a and b. These values are reported for the leaf material and reflect the composition of the commercially available herb, not isolated extracts or supplements. These nutritional characterizations originate from commercial and horticultural sources; the values have not been independently validated in peer-reviewed pharmacopeial analyses specific to aniseed myrtle at the time of this writing.

4. Mechanisms of Action

4.1 Antioxidant Mechanisms

Anethole's principal antioxidant abilities are attributed to three mechanisms: increased antioxidant enzyme activity, free radical scavenging, and metal ion chelation. Antioxidant activities in Syzygium anisatum extracts have been determined using DPPH (2,2-diphenyl-1-picrylhydrazyl) free radical scavenging and reducing power assays; major active compounds were quantified using ultra-high performance liquid chromatography. Hexane extracts contain the highest amount of bioactive compounds and demonstrate the strongest antimicrobial activities, while methanol and ethanol extracts reveal the highest phenolic content and antioxidant properties.

4.2 Anti-Inflammatory Mechanisms

Anethole has anti-inflammatory, antispasmodic, antiseptic, carminative, diuretic, and analgesic effects linked to its antioxidant properties. In a preclinical mouse study, the anti-inflammatory mechanism of anethole in LPS-induced acute lung injury was assessed by investigating its effects on NF-κB activation; anethole suppressed the activation of NF-κB by blocking IκB-α degradation. At a dose of 250 mg/kg, anethole decreased total protein concentrations; numbers of inflammatory cells, including neutrophils and macrophages; and the inflammatory mediators MMP-9, TNF-α, and NO.

4.3 Antimicrobial Mechanisms

Anethole possesses antibacterial and antifungal activities and contributes to the intense licorice and aniseed aroma in anise myrtle leaves currently utilized in cosmetics, savory cuisines, tea blends, body and mouth care products, alcoholic drinks, and the pharmaceutical industry. Fluorescence microscopic results indicate that the mechanism of action of related myrtle species against yeast is due to damage of the yeast cell membrane through penetration causing swelling and lysis leading to cell death. Anethole also shows synergistic effects on the antifungal activities of phytochemicals including polygodial and (2E)-undecenal against Saccharomyces cerevisiae and Candida albicans.

4.4 Metabolic and Neurological Mechanisms (from Anethole Research)

A systematic review found that anethole has the potential to protect against the key features of metabolic syndrome via various mechanisms, including antioxidant and anti-inflammatory effects, stimulating insulin secretion from β-cells, mediating oxidative stress, modulation of the mTOR/PPARγ axis, arterial remodeling, and improvement of vascular relaxation. Furthermore, anethole has a cardioprotective effect by suppressing the inflammatory signaling pathway, reducing myocardial apoptosis and necrosis, improving mitochondrial antioxidant enzyme activities, and stimulating the Nrf2 signaling pathway.

Preclinical studies have suggested several pharmacological effects for anethole, including neuroprotective properties. It has been determined that anethole, through modulation of monoamines, GABAergic, and glutamatergic neurotransmissions, as well as its possible anti-inflammatory and antioxidative stress properties, affects the central nervous system (CNS). Previous studies have demonstrated anxiolytic, antidepressant, antinociceptive, anticonvulsant, and memory improvement effects for anethole in preclinical models. These mechanistic findings are derived from animal and cell-based studies of anethole as an isolated compound; they do not constitute clinical evidence for aniseed myrtle as a whole-plant preparation.

5. Scientific Evidence by Area of Use

Important Note on Evidence Grade: The great majority of evidence for aniseed myrtle specifically is laboratory-based (in vitro and/or in vivo animal models). There are no published, registered randomized controlled clinical trials (RCTs) specifically on aniseed myrtle as a dietary supplement in human populations as of the available literature. Much of the pharmacological evidence is derived from studies on its principal active compound, anethole, which is shared by several plants (star anise, fennel, anise). Claims about aniseed myrtle's therapeutic properties in humans therefore rest on extrapolation from its chemistry.

5.1 Antimicrobial Activity

Evidence type: In vitro and ex vivo studies. No human clinical trials.

The essential oil has broad-spectrum antimicrobial activity but is more effective against bacteria than fungi. Using the agar disc diffusion method, antimicrobial activities were evaluated against two bacteria (Escherichia coli and Staphylococcus aureus) and six weak-acid resistant yeasts (Candida albicans, Candida krusei, Dekkera anomala, Rhodotorula mucilaginosa, Saccharomyces cerevisiae, and Schizosaccharomyces pombe). Extracts showed broad-spectrum antifungal activity against weak-acid resistant yeasts in comparison to the standard antifungal agents fluconazole and amphotericin B; Dekkera anomala was the most sensitive and strongly inhibited by all extracts, while Escherichia coli was the least sensitive.

In separate research, S. anisatum methanol and aqueous leaf extract significantly inhibited both gram-positive and gram-negative bacteria (Bryant & Cock, 2016).

In a 2018 study published in Food Chemistry, Nirmal et al. formulated anise myrtle essential oil into water nanoemulsions and assessed antibacterial activity. The study evaluated antibacterial activity against two gram-positive (Staphylococcus aureus, Listeria monocytogenes) and two gram-negative bacteria (Escherichia coli, Pseudomonas aeruginosa); notably, anise myrtle essential oil and its nanoemulsion did not show any inhibitory activity against these four bacteria, while lemon myrtle essential oil and its nanoemulsion displayed inhibitory activity against Staphylococcus aureus, Listeria monocytogenes, and Escherichia coli. This is a significant and contrasting finding compared to results from other testing methods. Evidence strength: preliminary in vitro only; results are mixed and depend heavily on the specific bacterial strains tested, the extract type, and the preparation method.

Research indicates that aniseed myrtle oil has antimicrobial activity, including on the pathogenic yeast Candida albicans. Anethole shows broad-spectrum antimicrobial activity; however, its antimicrobial properties are weaker than well-known antibiotics. Anethole significantly enhanced the antifungal activity of polygodial and dodecanol against baker's yeast Saccharomyces cerevisiae and the pathogenic yeast Candida albicans. Antimicrobial activity of anethole was reported as the second most effective after eugenol in inhibiting the growth of Salmonella typhimurium at a concentration of 75 μg/mL when grown in culture media.

5.2 Antioxidant Activity

Evidence type: In vitro studies and one pre-clinical (zebrafish) in vivo study. No human clinical trials.

Among the Australian myrtles studied, aniseed myrtle was quantified with the highest total phenolic content (52.49 ± 3.55 mg GAE/g) and total antioxidant potential. In the Konczak et al. study, Tasmannia pepper leaf had the highest total phenolics at 102.1 mg GAE/g dry weight, followed by anise myrtle at 55.9 mg GAE/g dry weight and lemon myrtle at 31.4 mg GAE/g dry weight.

A 2024 study characterized and evaluated the antioxidant potential and toxicological effects of anise myrtle (Syzygium anisatum) and lemon myrtle (Backhousia citriodora) leaves using zebrafish larvae as a model for high-throughput preclinical in vivo toxicology screening. The antioxidant capacity and toxicity were very similar in the two myrtles. The LC₅₀-96h for anise myrtle was 284 mg/L and for lemon myrtle, 270 mg/L. Despite the antioxidant activity and abundance of phenolic compounds such as epicatechin and catechin in anise myrtle, careful attention must be paid to safety before clinical use.

Evidence strength for antioxidant activity: established in vitro; confirmed in a pre-clinical zebrafish model; no human data.

5.3 Anti-Inflammatory Activity

Evidence type: In vitro and animal studies (principally for anethole). No human clinical trials specific to aniseed myrtle.

The anti-inflammatory potential of hydrophilic polyphenolic-rich extracts obtained from native Australian herbs — anise myrtle, lemon myrtle, and Tasmannia pepper leaf — has been evaluated in published research. The findings of this work (Sakulnarmrat et al., published in PubMed 2014) provide laboratory-level evidence for anti-inflammatory potential of anise myrtle polyphenolics.

Anethole, the major component of the essential oil of anise myrtle, has been reported to have antioxidant, antibacterial, antifungal, anti-inflammatory, and anesthetic properties. A mouse model of acute lung injury induced by lipopolysaccharide (LPS) was used to investigate the anti-inflammatory effects of anethole. These results, showing that anethole prevents LPS-induced acute lung inflammation in mice, suggest that anethole may be therapeutically effective in inflammatory conditions in humans — though this is speculative in the absence of human clinical trials. Evidence strength: animal-model evidence only for the specific anti-inflammatory mechanism; no human data for aniseed myrtle directly.

5.4 Metabolic Syndrome, Diabetes, and Cardiovascular Health

Evidence type: Animal studies and in vitro research, synthesized in a systematic review. No human RCTs.

A systematic review of dietary anethole using Web of Sciences, PubMed, Scopus, and Google Scholar to identify studies reporting protective effects against metabolic syndrome (MetS) found that anethole has the potential to effectively protect against the key features of MetS via various mechanisms, including antioxidant and anti-inflammatory effects, stimulating insulin secretion from β-cells, mediating oxidative stress, modulation of the mTOR/PPARγ axis, arterial remodeling, and improvement of vascular relaxation. Based on experimental studies conducted on rodents, it has been found that anethole is slowly absorbed after oral administration but is eventually completely absorbed. Future in vitro and animal investigations are recommended to explore other anti-MetS signaling pathways of anethole. Evidence strength: preclinical (rodent studies), no human data; systematic review is of animal/cell studies, not clinical trials.

5.5 Potential Cytotoxic and Cytoprotective Activity

Evidence type: In vitro cell-culture studies. No human clinical trials.

In one study, anise myrtle (Syzygium anisatum) was among three commercially grown native Australian herbs examined for cytoprotective properties. All native herbs exhibited greater cellular antioxidant activity as measured by the cellular antioxidant activity (CAA) assay compared to bay leaf, and reduced hydrogen peroxide (H₂O₂)-induced death of hepatocellular carcinoma (HepG2) cells by 25–50%. All herb extracts reduced the proliferation of colon (HT-29; IC₅₀ = 0.75–1.39 mg/ml), stomach (AGS; IC₅₀ = 0.59–1.88 mg/ml), bladder (BL13; IC₅₀ = 0.56–1.12 mg/ml), and liver (HepG2; IC₅₀ = 0.38–1.36 mg/ml) cancer cells. These findings are from cell culture studies only and cannot be extrapolated to clinical efficacy against cancer in humans. Evidence strength: preliminary in vitro; no human data; results apply to a mixed group of herbs, not aniseed myrtle alone.

5.6 Neurological Effects (Anethole Research)

Evidence type: Preclinical animal and in vitro studies. No human clinical trials.

Preclinical studies have suggested several pharmacological effects for anethole, including neuroprotective properties. Anethole, through modulation of monoamines, GABAergic, and glutamatergic neurotransmissions, as well as possible anti-inflammatory and antioxidative stress properties, has been shown to affect the CNS; previous studies have demonstrated anxiolytic, antidepressant, antinociceptive, anticonvulsant, and memory improvement effects in preclinical models. To fully understand its therapeutic potentials, more research is required to elucidate the precise mechanisms by which trans-anethole and cis-anethole affect the CNS. Evidence strength: all preclinical; clinical translation is entirely unproven.

5.7 Herbal Tea / Functional Beverage Use

Evidence type: Comparative analytical studies. No clinical outcomes data.

A study comparing the phytochemical profiles, organic acid content, minerals, and various antioxidant parameters of indigenous Australian herbal infusions — including gulban, anise myrtle, and lemon myrtle — against commercial green tea found that indigenous Australian herbal infusions had lower phenolic content than commercial green tea. Gulban infusions showed similar antioxidant capacity as commercial green tea; however, anise and lemon myrtle showed slightly lower antioxidant activity compared to green tea and gulban. Australian indigenous herbal infusions were a good source of calcium and magnesium compared to green tea.

6. Body Systems and Health Areas Associated with Aniseed Myrtle

Digestive system: Traditional use by Aboriginal people for a calming effect on the stomach. Anethole has documented carminative and antispasmodic properties in preclinical research.
Immune/microbial defence: Anise myrtle has strong antimicrobial, antifungal, and antioxidant properties.
Cardiovascular system: Anethole has a cardioprotective effect by suppressing the inflammatory signaling pathway, reducing myocardial apoptosis and necrosis, improving mitochondrial antioxidant enzyme activities, and stimulating the Nrf2 signaling pathway — evidence limited to animal studies.
Metabolic health: Anethole, the key constituent, has been examined for protective mechanisms against MetS, including diabetes, dyslipidemia, hyperglycemia, hypertension, and obesity in preclinical studies.
Central nervous system: Anethole, through modulation of monoamines, GABAergic, and glutamatergic neurotransmissions, has been shown to affect the CNS in preclinical models.
Cellular/antioxidant defence: All native herb extracts including anise myrtle exhibited greater cellular antioxidant activity than bay leaf and reduced hydrogen peroxide-induced death of hepatocellular carcinoma cells by 25–50% in vitro.
Food preservation/antimicrobial (non-therapeutic): Extracts showed broad-spectrum antifungal activity against weak-acid resistant yeasts in comparison to standard antifungal agents; Dekkera anomala was the most sensitive.

7. Dosage Forms and Reported Dosages

There are no established standardized therapeutic doses for aniseed myrtle as a dietary supplement in human clinical settings, as no clinical trials have been conducted. The following dosages relate strictly to experimental research contexts:

Animal anti-inflammatory studies (anethole): BALB/C mice were intraperitoneally administered anethole at doses of 62.5, 125, 250, or 500 mg/kg, 1 hour before intratracheal treatment with LPS (1.5 mg/kg).
Nanoemulsion essential oil (in vitro): The Central Composite Rotatable Design model produced the smallest droplet size for anise myrtle essential oil nanoemulsion (d ≈ 30.23 nm; PDI ≈ 0.216) at 1% EO and 10% surfactant mixture ratio using ultrasonication for 5 min.
Antimicrobial testing: Antimicrobial activity of anethole was reported at a concentration of 75 μg/mL against Salmonella typhimurium when grown in culture media.
Zebrafish toxicology (preclinical): The LC₅₀-96h for anise myrtle was determined to be 284 mg/L in the zebrafish larval model.
Cytotoxicity (in vitro): Herb extracts reduced the proliferation of colon (HT-29; IC₅₀ = 0.75–1.39 mg/ml), stomach (AGS; IC₅₀ = 0.59–1.88 mg/ml), bladder (BL13; IC₅₀ = 0.56–1.12 mg/ml), and liver (HepG2; IC₅₀ = 0.38–1.36 mg/ml) cancer cells in culture.
Feed additive (trans-anethole, EFSA assessment): Trans-anethole was assessed at maximum proposed use levels of 25 mg/kg complete feed and found to be of no safety concern for avian species.

For culinary use, the dried powdered leaf is used in gram quantities in recipes; for herbal infusions, whole or dried leaves are used in conventional tea preparations. No human pharmacokinetic or bioavailability data specific to aniseed myrtle leaf preparations have been identified in the peer-reviewed literature.

8. Safety Considerations and Toxicology

8.1 Regulatory Status of Trans-Anethole

An evaluation of anethole by the Joint FAO/WHO Expert Committee on Food Additives (JECFA) found its notable pharmacologic properties to be reduction in motor activity, lowering of body temperature, and hypnotic, analgesic, and anticonvulsant effects. A subsequent evaluation by JECFA found some reason for concern regarding carcinogenicity, but there is currently insufficient data to support this. At this time, the JECFA summary of these evaluations is that anethole has "no safety concern at current levels of intake when used as a flavoring agent."

8.2 Methyl Chavicol (Estragole) Content and Genotoxicity Concerns

Estragole belongs to the group of p-allylalkoxybenzenes and is considered a genotoxic carcinogen. This is a key safety consideration because methyl chavicol (also known as estragole) is a natural constituent of aniseed myrtle essential oil. However, the premium aniseed myrtle selections (anethole chemotype) are specifically low in methyl chavicol and cis-anethole, both below 0.1%. The methyl chavicol chemotype of anise myrtle — containing 55.8–75% methyl chavicol — would carry a markedly different risk profile from the commercially traded anethole-chemotype herb and essential oil.

8.3 Estrogenic Activity

Anethole has estrogenic activity. It has been found to significantly increase uterine weight in immature female rats. Fennel, which contains anethole, has been found to have a galactagogue effect in animals. The clinical implications for humans consuming aniseed myrtle at typical dietary or supplemental doses have not been studied directly.

8.4 Pre-Clinical Toxicology Screening

A study characterized and evaluated the toxicological effects of anise myrtle leaves using zebrafish larvae as a model for high-throughput preclinical in vivo toxicology screening, identifying safe levels of extract exposures for the development of future therapeutics. The antioxidant capacity and toxicity were very similar in anise and lemon myrtles. The LC₅₀-96h for anise myrtle was 284 mg/L, and for lemon myrtle, it was 270 mg/L.

While there have been studies on cell cultures, there has been limited research regarding the safety of anise myrtle using in vivo studies.

8.5 General Toxicity of Anethole at High Doses

In large quantities, anethole is slightly toxic and may act as an irritant. This property is relevant primarily to concentrated essential oil preparations rather than culinary or infusion uses of the dried leaf.

8.6 Environmental / Agricultural Safety Concern

A significant fungal pathogen, myrtle rust (Austropuccinia), was detected in aniseed myrtle plantations in January 2011. Myrtle rust severely damages new growth and threatens aniseed myrtle production. This represents a supply-chain and quality-assurance concern for commercial herbal preparations rather than a direct human safety risk.

9. Research Gaps and Summary of Evidence Quality

Aniseed myrtle has been comprehensively characterized for its phytochemical composition, particularly for its essential oil volatile profile and phenolic content. Multiple in vitro studies provide consistent evidence for antioxidant and antimicrobial activities. The pharmacological properties attributed to the plant are largely mediated by its major constituent, trans-anethole, a compound with an independently established mechanistic literature in preclinical models.

However, these plants are rich in antioxidants and exhibit numerous biological properties, including antioxidant, anti-inflammatory, and antimicrobial properties; while there have been studies on cell cultures, there has been limited research regarding their safety using in vivo studies. No peer-reviewed, randomized human clinical trials have been conducted on aniseed myrtle as a whole-herb preparation for any therapeutic indication. The existing research provides new insight into the novel potent bioactive phenolic compounds from Australian myrtles that could potentially be useful for functional, nutraceutical, and therapeutic applications, but this potential has not been substantiated in clinical human evidence. All health-related claims based on the current literature remain speculative with respect to human therapeutic use.

References

Health Conditions

Health conditions that Aniseed myrtle may help support.

No conditions available.

Body Systems

Body systems that Aniseed myrtle may help support.

No body systems available.