Science
Mechanism of Action
This extract operates through several key pathways: it functions as a robust antioxidant, shielding skin cells from oxidative stress and DNA damage, thereby mitigating premature aging. Its anti-inflammatory action involves reducing pro-inflammatory markers such as TNF-α and IL-6, alongside diminishing COX-2 and iNOS activity. Furthermore, it possesses broad-spectrum antimicrobial efficacy against bacteria, fungi, and viruses, helping to maintain skin hygiene and promote recovery. These beneficial effects are primarily attributed to its rich profile of phytochemicals, including coumarins, flavonoids, tannins, and proanthocyanidines.
Research
Clinical Evidence
Medium confidenceN/A
Key findings
- 01 Demonstrated cytotoxic activity against lung cancer cell lines, with leaf extract showing effect at 18.45 μg/mL and stem extract at 33.61 μg/mL, inducing apoptosis and S-phase arrest.
- 02 Reported promising outcomes in the management of verruca pedis (plantar warts), various skin infections, and promoting wound healing.
- 03 Successfully treated verruca vulgaris in a renal allograft recipient, indicating specific therapeutic potential.
Transparency
Dusting Analysis
No specific data suggests this ingredient is commonly associated with 'dusting' concerns or has established dusting thresholds for cosmetic applications.
The Formula
Formulation
Stability
When formulated into an ointment, Thuja Occidentalis extract exhibited good consistency, spreadability, and homogeneity. It maintained pH stability and showed no signs of phase separation or significant alteration in visual appearance, viscosity, or aroma over the research period.
Safety
Safety Profile
This ingredient is subject to restrictions in Europe and the United Kingdom under Annex III of the EC Cosmetics Regulation, following assessment by the Scientific Committee on Consumer Safety (SCCS). These restrictions may pertain to purity criteria, maximum allowable concentrations, or specific product categories. A key safety concern is the presence of α-thujone, a neurotoxin, particularly when present in high content. While these notes primarily refer to topical use restrictions, internal consumption of Thuja preparations could activate the immune system and potentially induce seizures in some individuals, advising caution for those with autoimmune diseases or a history of seizures. Specific maximum topical concentrations are not detailed in the provided data.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Thuja Occidentalis Leaf/Stem Extract offers valuable antioxidant, anti-inflammatory, and antimicrobial benefits for skin health and renewal; however, its application requires precise formulation to ensure compliance with regulatory restrictions and to mitigate concerns regarding α-thujone content.
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References
Sources