Science
Mechanism of Action
This ingredient functions by leveraging a rich profile of active compounds including phenolic acids (e.g., gallic acid), proanthocyanidins, carotenoids, flavonoids, tannins, and vitamins A and C. These components collectively scavenge free radicals and inhibit lipid peroxidation, providing robust antioxidant protection. Its anti-inflammatory action is mediated through the suppression of inflammatory pathways, including modulation of the MAPK/NFκB signaling pathway. Furthermore, it supports skin hydration by upregulating key moisturizing biomarkers (HAS 1-3) and concurrently downregulating hyaluronidase (HYAL 1-2) via the PI3K/AKT/NFκB pathway, specifically through HAS2 regulation. Subtly astringent, it aids in moderating sebum production and refining pore appearance. The carotenoids present also contribute to photoprotective and regenerative effects, assisting in minimizing UV-induced damage and the appearance of fine wrinkles.
Research
Clinical Evidence
Medium confidenceN/A
Key findings
- 01 Persimmon fruit extracts demonstrated potent antioxidant activity, exhibiting at least 55% ABTS•+ radical scavenging at 2.5 mg/mL in an in vitro study.
- 02 In human keratinocytes (HaCaT cells), Diospyros kaki fruit extracts delivered via gold nanoparticles (DK-AuNPs) at 200 µg/mL led to 98.2% cell survival and a 68.7% reduction in ROS production in vitro, highlighting anti-inflammatory and moisturizing effects.
- 03 Further in vitro studies indicated that fruit extracts at 50 mg/ml offered superior protection against H2O2-induced DNA damage in human leukocytes.
- 04 While focusing on the fruit, a cosmetic cleanser containing Diospyros kaki folium (leaves) significantly reduced skin oil content by 77.3%, pore number by 24.83%, and pore size by 71.43% (from 0.07 to 0.02 µm³) in 23 healthy human volunteers, suggesting related benefits for sebum and pore management.
Transparency
Dusting Analysis
There is no indication that Diospyros Kaki Fruit Juice or its derivatives are commonly "dusted" ingredients, meaning included at ineffective concentrations purely for marketing claims. Its active components are typically effective within established research ranges.
The Formula
Formulation
Stability
The natural pH of persimmon pulp is approximately 6.47 ± 0.03. Its beneficial phenolic compounds are primarily water-soluble. Due to the inherent instability and large molecular weight of some phenolic compounds, advanced delivery systems like phytosomes are being investigated to enhance their absorption and stability within formulations, thereby optimizing their bioavailability.
Safety
Safety Profile
Diospyros Kaki Fruit Juice is generally regarded as safe for cosmetic applications, with regulatory approval from bodies like the European Cosmetics Regulation. While no specific CIR or SCCS reviews are available, serious side effects are rare. It is classified as 'Restricted' by EWG for their 'VERIFIED' products due to a lack of specific substantiation, but this is a consumer guidance rating, not a regulatory prohibition. Patch testing is advisable for individuals with known sensitive skin.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Diospyros Kaki Fruit Juice is a valuable multi-functional ingredient, providing significant antioxidant, anti-inflammatory, and moisturizing benefits, with demonstrated potential for sebum regulation and pore refinement.
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