Science
Mechanism of Action
This extract operates through several biological pathways to significantly improve skin condition. It forms a protective surface barrier, aiding in moisture retention and preventing transepidermal water loss. As a robust antioxidant, it effectively neutralizes reactive oxygen species (ROS) induced by UVB radiation, a primary contributor to photoaging. It precisely intervenes in cellular signaling cascades by inhibiting the phosphorylation of JNK, ERK, and p38, and the formation of AP-1, pathways critical in inflammation and collagen degradation. The extract supports dermal integrity by promoting the production of essential structural proteins like type I collagen, elastin, and hyaluronic acid synthase, while simultaneously downregulating matrix metalloproteinases (MMP-1, 3, and 9) which accelerate the breakdown of these vital components. Furthermore, it strengthens the skin barrier by upregulating filaggrin, HAS1, and HAS2 expression, and contributes to improved skin translucency by reducing protein carbonylation in the stratum corneum. The fruit's rich content of flavonoids, polyphenols, and iridoids underpins these multifaceted actions.
Research
Clinical Evidence
Medium confidenceN/A
Key findings
- 01 In UVB-irradiated hairless mice, oral administration of Actinidia polygama extracts (100-200 mg/kg) over 10 weeks significantly alleviated skin aging symptoms, including reduced wrinkling, epidermal hyperplasia, and water loss. This was attributed to increased skin elasticity via enhanced type I collagen, elastin, and hyaluronic acid synthase production, coupled with down-regulation of MMP-1, 3, and 9 expression.
- 02 In vitro studies using HaCaT cells demonstrated that Actinidia polygama water extract (PB203) effectively alleviated UVB-induced reactive oxygen species production and inhibited the phosphorylation of JNK, ERK, and p38, as well as AP-1 formation. It also prevented decreases in type I collagen and TIMP-1 levels while inhibiting MMP-1 increases in UVB-exposed HaCaT cells. Moreover, it enhanced skin barrier function by increasing the expression of filaggrin, HAS1, and HAS2.
- 03 Clinically, the extract has been proven to reduce carbonylated proteins on the skin, resulting in an increase in perceived skin translucency.
- 04 In vitro testing of Actinidia polygama water extract (PB203) showed no cytotoxicity in HaCaT cells at concentrations ranging from 5-20 μg/ml, with only low cytotoxicity observed at 40 μg/ml.
Transparency
Dusting Analysis
Insufficient data available in the provided research to assess common dusting practices or specific dusting thresholds for this ingredient.
The Formula
Formulation
Safety
Safety Profile
Generally considered safe for topical use in cosmetic products. While side effects are uncommon, potential skin irritation, allergic reactions, redness, or itching may occur, particularly in individuals sensitive to botanical extracts. Patch testing is recommended before widespread usage.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Actinidia Polygama Fruit Extract is a valuable, multifunctional ingredient that precisely targets signs of photoaging, enhances skin barrier function, and improves overall skin translucency and condition through potent antioxidant and collagen-supportive mechanisms.
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