Science
Mechanism of Action
This oil primarily functions through its content of phenolic compounds like carvacrol, which induce cell lysis in various bacteria and exhibit antifungal activity against dermatophytes. It also mitigates inflammation by inhibiting pro-inflammatory cytokines, reducing associated swelling and pain. Its rich polyphenol content contributes antioxidant benefits, combating free radical damage that can lead to hyperpigmentation and premature aging. Additionally, the oil provides soothing effects and supports wound healing through its combined analgesic, anti-inflammatory, and antioxidant actions.
Research
Clinical Evidence
Low confidenceN/A
Key findings
- 01 Commonly incorporated into cosmetic formulations at concentrations between 0.5% and 2% for various applications, including targeted products for problematic skin. However, explicit clinical studies detailing the specific cosmetic effects at these concentrations require further investigation.
- 02 Plectranthus amboinicus essential oil demonstrated significant antimicrobial activity against *Staphylococcus aureus* with a Minimum Inhibitory Concentration (MIC) of 32 µg/mL, and against *Proteus vulgaris* with an MIC of 64 µg/mL. Notably, it did not exhibit activity against *Pseudomonas aeruginosa*, *Escherichia coli*, or *Enterobacter cloacal*. It is important to acknowledge that this study specifically referenced the essential oil, not explicitly 'leaf/stem oil'.
Transparency
Dusting Analysis
The Formula
Formulation
Stability
The chemical composition of the essential oil, particularly the levels of key phytochemicals such as carvacrol and thymoquinone, can be influenced by environmental factors like light exposure and temperature during harvesting. A topical cream formulated with Plectranthus amboinicus extract remained stable and maintained a pH of 5.5, suggesting optimal stability for extracts in formulations around this pH range.
Safety
Safety Profile
Specific safety assessments by major regulatory bodies such as CIR, SCCS, or FDA are not available for PLECTRANTHUS AMBOINICUS LEAF/STEM OIL. While a traditional topical application of 0.5% leaf juice on rabbits did not induce skin changes over 72 hours, indicating low irritancy at this concentration, it is critical to dilute essential oils and adhere to IFRA standards for maximum allowable concentrations in cosmetic products. Undiluted or high concentrations may pose a risk of irritancy, particularly for sensitive skin. There is no documented information regarding the safety of medicinal use in children or in pregnant or lactating women.
Your Skin
Skin Compatibility
Our Assessment
Verdict
PLECTRANTHUS AMBOINICUS LEAF/STEM OIL offers valuable antimicrobial, anti-inflammatory, and antioxidant benefits for problematic skin, though further targeted cosmetic clinical studies are needed to confirm specific efficacy at typical usage concentrations.
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