28 HAIR CARE
Figure 2: Eucalyptus kochii, as the source of Australian eucalyptus oil
flow to the scalp, providing essential nutrients to hair follicles. This increased circulation can help promote hair growth and improve the overall condition of the scalp.
Enhancement of immune response Eucalyptus oil also plays a role in enhancing the scalp’s immune response. Its antiseptic and anti-inflammatory properties help protect the scalp from external stressors and potential pathogens, further supporting overall scalp health.
Aromatic properties In addition to its therapeutic benefits, eucalyptus oil is known for its pleasant scent, characterized by clean, fresh, and invigorating notes, gradually transitioning into dry, smoky, woody undertones. This aromatic profile not only enhances the
sensory experience of hair care products but also contributes to a refreshing and uplifting application.
Sustainability and traceability Eucalyptus oil from Eucalyptus Kochii is 100% sustainable and traceable, ensuring that consumers can trust the origins of the products they use. Originating from West Australia, this
eucalyptus variety boasts the highest natural concentration of eucalyptol, making it a unique and effective ingredient in hair and scalp care formulations.
3. Manuka oil (Leptospermum scoparium) Manuka oil is renowned for its potent therapeutic properties, including antibacterial, antifungal, and anti-inflammatory effects. Research indicates that concentrations of 0.1% to 10% Manuka oil significantly reduce the release of TNF-α, an inflammatory mediator, thereby supporting a healthy scalp environment. Its unique high triketone content allows for maximum antimicrobial efficacy, with as little as 0.091% concentration needed to achieve a 99% kill rate against Staphylococcus aureus. Manuka oil plays a crucial role in
maintaining a balanced scalp microbiome, effectively suppressing harmful microorganisms while promoting beneficial bacteria. This
PERSONAL CARE January 2025
Figure 4: Santalum spicatum, the source of Australian sandalwood seed oil
Figure 3: Leptospermum scoparium, the source of manuka oil
balance is essential for preventing conditions like dandruff and scalp irritation. Additionally, Manuka oil supports healthy
oil balance and enhances antioxidant and immune responses, contributing to overall scalp health. The oil’s traditional uses include treating
skin conditions and promoting wound healing, making it a versatile ingredient in personal care formulations. With its herbaceous and medicinal aroma, combined with uplifting honey-like notes, manuka oil is increasingly recognized by consumers, particularly due to its association with the well-known manuka honey. Its origins in Australia and New Zealand
further enhance its appeal as a natural remedy in hair and scalp care products.
4. Sandalwood seed oil (Santalum spicatum) Sandalwood seed oil is a remarkable ingredient known for its high concentration of ximenynic acid, which is naturally present at over 30%. This unique compound has been shown to increase blood circulation in the skin by constricting micro-vessels. Enhanced blood flow is crucial for delivering essential nutrients to hair follicles, supporting hair growth and preventing hair loss. In addition to boosting circulation,
sandalwood seed oil also helps regulate sebum
secretion. By controlling oil production on the scalp, it maintains a healthy oil balance, reducing the risk of clogged hair follicles and associated scalp issues. This dual action not only promotes a healthier scalp environment but also enhances the overall vibrance and glow of hair.
Sandalwood seed oil is also known for its
anti-inflammatory properties. The structure of ximenynic acid is similar to enzymes that catalyze arachidonic acid, effectively blocking the creation of downstream inflammatory cascades. Studies have shown that sandalwood seed oil is effective at concentrations as low as 7% w/w, making it a potent yet gentle option for hair and scalp care formulations. By effectively blocking inflammation,
sandalwood seed oil paves the way for tangible benefits, offering a promising solution for improving scalp health and combating hair loss. Overall, the combination of increased
blood circulation, sebum regulation, and anti-inflammatory effects makes sandalwood seed oil an invaluable ingredient in promoting a healthy scalp and supporting hair growth.
5. Lemon-scented tea tree oil (Leptospermum petersonii) Lemon-scented tea tree oil is a powerful natural ingredient known for its therapeutic properties and effectiveness against head lice. In two clinical trials involving 152 children in Australia, a solution containing eucalyptus oil and lemon-scented tea tree oil was found to be more than twice as effective in curing head lice infestations compared to traditional pyrethrins and piperonyl butoxide (P/PB mousse), achieving an impressive 83% success rate versus 36% (P < 0.0001). Remarkably, the lemon scented tea tree
and eucalyptus oil blend demonstrated 100% effectiveness as a pediculicide following a single application, with in vitro testing revealing 100% mortality of lice and eggs upon exposure. Beyond its efficacy against lice, lemon-
scented tea tree oil supports a healthy scalp microbiome, helping to maintain a balanced environment. It also promotes a healthy oil balance and enhances antioxidant and immune responses, making it a versatile
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