Lemon Myrtle: Powerful Health Benefits, Uses, and Nutrition

Lemon myrtle (Backhousia citriodora) is prized for its vibrant citrus aroma and a remarkable spectrum of health benefits. Endemic to Australia, this versatile plant is rapidly gaining attention around the globe for its therapeutic potential—spanning from immune support and antioxidant defense to digestive wellness and beyond.
In this comprehensive article, explore the science-backed health benefits of lemon myrtle, its active compounds, culinary uses, side effects, and answers to your most common questions.

Table of Contents

• What Is Lemon Myrtle?
• Nutritional Profile and Active Compounds
• Top 10 Health Benefits of Lemon Myrtle
• How to Use Lemon Myrtle
• Safety, Side Effects, and Precautions
• Frequently Asked Questions (FAQs)
• Key Takeaway

What Is Lemon Myrtle?

Lemon myrtle is an Australian native plant belonging to the Myrtaceae family. Recognized for its strong lemon scent (thanks to high citral content), the leaves of this evergreen tree are used in culinary, cosmetic, and medicinal applications. Indigenous Australians have valued lemon myrtle for centuries for its healing properties, using it for teas, remedies, and food flavoring.

• Botanical name: Backhousia citriodora
• Other names: Lemon scented myrtle, sweet verbena tree
• Native to: Queensland, Australia
• Flavor and Aroma: Intense lemony scent, with sweet and slightly herbal undertones
• Main bioactive compound: Citral (70–98% of essential oil)

Nutritional Profile and Active Compounds

Lemon myrtle is especially rich in bioactive compounds responsible for its health-promoting effects:

• Citral: The main phytochemical, gives lemon myrtle its strong aroma and much of its antimicrobial and anti-inflammatory powers.
• Flavonoids: Like catechins, quercetin, and luteolin—potent antioxidants that neutralize free radicals and support immunity.
• Polyphenols: Contribute to its antioxidant, anti-inflammatory, and gut-health-promoting effects.
• Minerals: Contains calcium, zinc, magnesium, and vitamins such as C and E (present in trace quantities).

Together, these constituents make lemon myrtle not just fragrant but also a science-backed functional food and natural remedy.

Top 10 Science-Backed Health Benefits of Lemon Myrtle

Lemon myrtle has attracted growing scientific attention for a variety of health benefits. Here’s an in-depth look at the top evidence-based actions:

1. Antioxidant Protection

Antioxidants in lemon myrtle—including flavonoids and polyphenols—combat oxidative stress, which is linked to aging, inflammation, and chronic diseases such as cancer and heart disease. These molecules neutralize free radicals before they can damage cells, thereby helping preserve longevity and prevent degeneration.

2. Anti-inflammatory Effects

Lemon myrtle extract significantly reduces markers of inflammation in the body, as demonstrated in cell and animal studies. It inhibits production of pro-inflammatory cytokines such as interleukin-6 (IL-6) and tumor necrosis factor-alpha (TNF-α), potentially helping to manage conditions like inflammatory bowel disease and arthritis.

3. Antimicrobial and Antifungal Power

The high citral content of lemon myrtle gives it potent antibacterial, antifungal, and antimicrobial activity. Research supports its effectiveness in controlling pathogens including Staphylococcus aureus, Escherichia coli, and some Candida species, making it valuable for:

• Supporting oral health
• Topical use for minor cuts, wounds, and fungal infections
• Natural surface cleaning

This property also underpins lemon myrtle’s widespread use in natural cosmetics, soaps, and household cleaning products.

4. Immune System Support

With both anti-inflammatory and antioxidant capacity, lemon myrtle helps to strengthen immune defense. Its compounds are shown to support a balanced immune response, promoting resilience against infections and supporting recovery from illness.

5. Gut and Digestive Health

Lemon myrtle can aid in improving digestion by boosting digestive enzymes and reducing gastrointestinal inflammation. Its flavonoids may promote the growth of beneficial gut microbes, which in turn aid overall gut function and immune modulation. Early research indicates that these bioactives may support gut barrier health and reduce the risk of digestive disorders, but more human data is needed.

6. Stress Relief and Mood Enhancement

Lemon myrtle is traditionally valued for its calming and relaxing properties. Inhaling its aroma, or consuming tea, may help relieve mild stress, reduce anxiety, and promote relaxation. Some users find it helpful for sleep and overall mood support—though more clinical evidence is warranted.

7. Skin Health and Anti-Aging

The antioxidants and anti-inflammatory compounds in lemon myrtle can help protect the skin from environmental damage including UV and pollution. This translates to benefits such as:

• Prevention of premature aging and wrinkles
• Soothing of irritated or inflamed skin
• Support in managing acne and minor skin infections

8. Metabolic and Weight Management Support

Early studies suggest lemon myrtle may contribute to metabolic health:

• Inhibits alpha-amylase (an enzyme that digests carbohydrates)—which may help control blood sugar
• Promotes healthy metabolism, possibly supporting weight loss or management
• Reduces insulin sensitivity and improves glucose tolerance in animal and cell studies, potentially reducing risk of metabolic syndrome

9. Respiratory Health

Lemon myrtle is a traditional Australian remedy for managing coughs, colds, sore throats, and sinus infections. Its antimicrobial and soothing actions may:

• Relieve upper respiratory symptoms
• Help clear congestion and reduce throat irritation

Steaming or inhaling lemon myrtle can provide added comfort during seasonal illnesses.

10. Oral Health

The potent antibacterial qualities help inhibit bacteria that cause bad breath, gum disease, and tooth decay, making lemon myrtle an ingredient in some toothpastes, mouthwashes, and dental hygiene products.

Nutritional and Bioactive Comparison Table

How to Use Lemon Myrtle

Lemon myrtle’s zingy flavor and aromatic properties lend themselves to a variety of culinary, wellness, and cosmetic uses.

Culinary Uses

• Herbal tea: Steep dried leaves for a soothing, citrus-flavored infusion.
• Cooking spice: Use dried, crushed leaves to flavor fish, poultry, salads, baked goods, marinades, and desserts.
• Flavored oils and vinegars: Infuse for salad dressings or finishing dishes.
• Desserts: Enhance cakes, syrups, curds, and preserves.

Wellness and Everyday Uses

• Essential oil: Dilute and apply topically for antimicrobial action (avoid undiluted use on skin).
• Aromatherapy: Add to diffusers for relaxation and odor control.
• Natural cleaning: Use in homemade disinfectant sprays for its antimicrobial effect.
• Skincare: Included in lotions and creams to soothe skin irritation and promote clear skin.

Note: Lemon myrtle essential oil should not be ingested unless formulated as a food product.

Safety, Side Effects, and Precautions

• Lemon myrtle leaf and culinary preparations are generally considered safe for most people when consumed in typical food amounts.
• Essential oil is very strong and should never be applied to the skin without dilution. Avoid ingestion unless specifically labeled as food-grade and in recommended amounts.
• Always perform a patch test to rule out allergic reactions before using lemon myrtle oil on the skin.
• People with sensitive skin, pregnant or breastfeeding women, and those with chronic illnesses should consult a healthcare provider before using lemon myrtle supplements or oil.
• There are no well-documented drug interactions, but caution is advised until more clinical research is available.

Frequently Asked Questions (FAQs)

Q: What does lemon myrtle taste and smell like?

A: Lemon myrtle has an exceptionally intense lemon scent—fresher and more vibrant than actual lemons—alongside sweet, herbal undertones. Its flavor is clean, citrusy, and slightly spicy.

Q: Can lemon myrtle help with colds and flu?

A: Yes, lemon myrtle’s antimicrobial and soothing properties make it a useful traditional remedy for coughs, congestion, and sore throats, either as a herbal tea or in steam inhalations.

Q: Is lemon myrtle safe for children and pets?

A: Lemon myrtle leaf used as tea or food spice is generally safe. Avoid giving essential oil preparations to young children or pets due to risk of irritation or toxicity.

Q: How does lemon myrtle compare to other citrus herbs?

A: Lemon myrtle contains the highest natural concentration of citral among citrus herbs and fruits, making it more aromatic and potent in flavor and benefits than lemongrass, lemon balm, or lemon verbena.

Q: Are there any side effects of using lemon myrtle?

A: Side effects are rare when used as a food ingredient. High concentrations (especially essential oil) may cause skin irritation, stomach upset, or allergies in sensitive individuals.

Key Takeaway

Lemon myrtle stands as the ‘Queen of Australian Herbs,’ celebrated not just for its incredible citrus fragrance, but for its robust health benefits. Backed by both traditional wisdom and emerging science, this botanical powerhouse supports immune strength, digestive wellness, metabolic health, and radiant skin—making it a versatile addition to both your kitchen and wellness toolkit. Always use with informed guidance for optimal safety and benefit.

Author

Medha DebCommerce Editor

 

Medha Deb is a commerce editor with a master's degree in applied linguistics from the University of Hyderabad, which has allowed her to develop a deep understanding of language and its application in various contexts. She specializes in the areas of beauty, health, and wellness and is committed to ensuring that the content on the website is of the highest quality.

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