Science
Mechanism of Action
This ingredient functions primarily as an emollient, imparting a soft and smooth feel to the skin, and as a skin conditioning agent, helping to maintain the skin's optimal state. It also serves as a humectant, drawing and retaining moisture within cosmetic products and on the skin's surface. Furthermore, its antioxidant properties help protect formulations from oxidative degradation. Drawing from research on the non-hydrogenated variant, it is understood to support skin barrier function by reducing transepidermal water loss (TEWL), promote skin suppleness through collagen preservation and synthesis, and exhibit anti-inflammatory effects by modulating inflammatory mediators.
Research
Clinical Evidence
Medium confidenceN/A
Key findings
- 01 A 1% concentration of Camellia japonica oil, incorporated into a lotion, demonstrated a significant reduction in transepidermal water loss (TEWL) over a 2-hour period in a clinical evaluation involving 30 Korean female volunteers aged 20–29 years.
- 02 In vitro testing revealed that Camellia japonica seed oil, at concentrations ranging from 0.01 to 1 mg/ml, stimulated the production of type I collagen in human dermal fibroblasts and inhibited matrix metalloproteinase (MMP)-1 activity, without exhibiting toxicity to human dermal fibroblasts or HaCaT cells.
Transparency
Dusting Analysis
No data indicates this ingredient is commonly dusted.
The Formula
Formulation
Stability
Hydrogenated Camellia Japonica Seed Oil contributes to emulsion stability, aiding in the formation and longevity of formulations. While specific pH optimal ranges for this hydrogenated oil are not detailed, an emulsion containing Camellia oleifera oil was found to be optimal within a pH range of 5.74 to 6.03, aligning with physiological skin pH. For general storage, non-hydrogenated Camellia oil should be kept away from direct sunlight and extreme temperatures (above 25 °C or below 5 °C) for up to 12 months.
Safety
Safety Profile
While 'Hydrogenated Camellia Japonica Seed Oil' has not undergone specific review by CIR, SCCS, or FDA, the non-hydrogenated 'Camellia Japonica Seed Oil' generally receives a low hazard rating (EWG score of 1). It is considered safe for most skin types, with very rare instances of mild irritation reported only in individuals with extremely sensitive skin. The CIR concluded 'Camellia sinensis seed oil' as safe for use in 2011, offering a comparable safety context for related Camellia species oils.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Hydrogenated Camellia Japonica Seed Oil is a valuable ingredient, providing significant emollient, moisturizing, and barrier-supporting benefits with a low risk of irritation or comedogenicity, making it highly compatible with a broad range of skin types.
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