🔬 Studies & Science behind Orvelle Nail Fungus Pen

🌿 Tea tree oil (Melaleuca alternifolia) — a research classic from Australia

The essential oil of Melaleuca alternifolia is one of the most thoroughly studied plant oils in dermatology. The Bundjalung people of the Australian east coast were using the plant long before any laboratory looked at it. The principal bioactive compound is terpinen-4-ol, which has been tested in numerous in vitro studies against dermatophyte fungi such as Trichophyton rubrum.

A classic double-blind randomised comparison by Buck et al. (J Fam Pract, 1994) examined 117 patients with culture-proven distal subungual onychomycosis. Over six months, participants applied either 1% clotrimazole solution or 100% tea tree oil twice daily. Both groups showed comparable clinical improvements.

A later study in 60 patients by Syed et al. (Trop Med Int Health, 1999) combined 5% tea tree oil with 2% butenafine in a cream: after 16 weeks, 80% of those treated were culture-negative, compared with 0% in the placebo group.

A more recent in vitro investigation by Garzoli et al. (J Fungi, 2024) determined the minimum inhibitory concentrations of various commercial tea tree oils against three Trichophyton species isolated from clinical onychomycosis samples. T. rubrum proved to be the most sensitive species.

🍃 Peppermint oil (Mentha piperita) — menthol under the microscope

Peppermint oil has been used in skin-care preparations since antiquity. Its main constituents are menthol and menthone, both of which have shown activity against various microorganisms in vitro.

A widely cited paper by Iscan et al. (J Agric Food Chem, 2002) tested peppermint oil against 21 human and plant pathogens. Bioautographic analysis identified menthol as the component primarily responsible for the antimicrobial activity.

An Italian research group led by Tullio et al. (Molecules, 2019) examined the antifungal activity of a regional peppermint oil against Candida strains — both on its own and in combination with azoles, with synergistic effects observed in vitro.

🌺 Shikonin from Lithospermum erythrorhizon — the red root from East Asia

The root of Lithospermum erythrorhizon, known in traditional Chinese medicine as Zicao, has been used for over two thousand years for skin lesions, burns and wounds. The main constituent shikonin — a red-coloured naphthoquinone — is the subject of modern pharmacological research.

A systematic review by Guo et al. (Pharmaceuticals, 2023) summarises the research on wound healing, antimicrobial activity and skin regeneration.

In an animal study by Xue et al. (J Gene Med, 2024), shikonin was applied to skin wounds in a diabetic rat model. The researchers observed faster wound contraction, increased collagen deposition and greater angiogenesis compared with untreated control wounds.

🍊 Vitamin C (ascorbic acid) — cofactor for collagen formation

Ascorbic acid is a cofactor for several hydroxylases essential to collagen synthesis. Applied topically, vitamin C has been examined in a number of clinical studies.

Nusgens et al. (J Invest Dermatol, 2001) showed elevated mRNA expression of collagen types I and III — along with their processing enzymes — in the dermis of postmenopausal women after topical vitamin C application to the forearm.

In a double-blind randomised study by Humbert et al. (Exp Dermatol, 2003), a 5% vitamin C cream was applied for six months to the photoaged skin of female participants. Clinical and ultrastructural assessment found improvements in skin texture compared with placebo.

💧 Jojoba oil (Simmondsia chinensis) — liquid plant wax

Chemically speaking, jojoba oil isn’t a triglyceride but a liquid wax closely related to the skin’s own sebum. That property has made it a staple of dermatological formulations.

In an in vitro study by Ranzato et al. (J Ethnopharmacol, 2011), jojoba wax was tested on keratinocytes and fibroblasts. The researchers observed faster wound closure in scratch assays and increased collagen secretion.

🌹 Rosehip oil (Rosa canina) — pressed oil from the wild rose

Rosehip oil is cold-pressed from the seeds of the wild rose. It contains a high proportion of polyunsaturated fatty acids along with small amounts of vitamin C and carotenoids.

An experimental study by Lei et al. (Planta Med, 2019) showed faster wound healing and improved scar formation in an excisional wound model. The authors attribute the effect to an accelerated macrophage phenotype switch from M1 to M2.

A review by Belkhelladi & Bougrine (J Cosmet Dermatol, 2024) examined the evidence on post-surgical scars and burns — with consistent indications of shorter wound-healing times with topical application.

🪴 The remaining plant oils — carriers with character

Sweet almond oil, avocado oil, camellia oil, Chilean hazelnut oil, meadowfoam seed oil, evening primrose oil, rapeseed oil, grapeseed oil and shea butter serve as carrier oils in the formula. A comprehensive review by Lin et al. (Int J Mol Sci, 2017) classifies these oils by fatty acid profile and the application areas studied: high linoleic acid content in rosehip and evening primrose, a high proportion of wax esters in jojoba, and high triterpene content in shea butter. Camellia oil has been used in East Asian tradition for hair and skin care for centuries, while Chilean hazelnut oil is a pressed oil endemic to the Andes.

⚖️ Transparency: what the studies say — and what they don’t