Science
Mechanism of Action
Royal Jelly Water operates through several key pathways to improve skin condition. It directly enhances skin moisturizing and hydration by increasing stratum corneum water content. Its anti-melanogenic activity is achieved by inhibiting tyrosinase enzyme activity and suppressing the expression of genes crucial for melanin synthesis (tyrosinase, TRP-1, and TRP-2). Furthermore, Royal Jelly Water protects against UVB-induced photoaging through enhanced collagen synthesis, partly attributed to its 10-hydroxy-2-decenoic acid (10-HDA) content. It reduces inflammatory mediators like TNF-α, combats free radicals, and lessens oxidative stress. Major Royal Jelly Proteins (MRJPs) within it support keratinocyte migration, while its B vitamin content contributes to overall skin health.
Research
Clinical Evidence
Medium confidenceN/A
Key findings
- 01 Topical application of an essence containing royal jelly extract for 4 weeks significantly improved stratum corneum water content in healthy Japanese individuals, confirming enhanced moisturizing function.
- 02 A cream containing 10% royal jelly applied topically effectively reduced levels of the inflammatory mediator TNF-α in UVB-induced rat skin tissue.
- 03 10-hydroxy-2-decenoic acid (10-HDA), a key royal jelly component, applied in a cream at 0.5%, 1%, and 2% concentrations on mouse skin for three weeks, significantly stimulated skin whitening.
- 04 Water-soluble royal jelly (WSRJ) at 10 μg/mL reduced mushroom tyrosinase activity by 11% and inhibited cellular tyrosinase activity and melanin synthesis in α-MSH stimulated melanoma cells at 1-100 μg/mL without cytotoxicity.
Transparency
Dusting Analysis
Clinical studies report efficacy at specific concentrations, including 10% for anti-inflammatory effects and a range of concentrations for its whitening component (10-HDA) and water-soluble form (WSRJ). No data suggests common dusting practices or defined dusting thresholds.
The Formula
Formulation
Stability
Royal jelly inherently has a pH between 3.4 and 4.5. Its major royal jelly proteins (MRJPs) exhibit highest stability at its native pH of 4.0 or 4.5, maintaining good stability across the broader acidic to neutral pH range of 4.0 to 7.0.
Conflicts
- Individuals with known allergies to bee products or pollen
- Women with a history of breast or ovarian cancers (due to mild estrogenic effects, consultation advised)
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has not specifically assessed 'Royal Jelly Water' for cosmetic use. While patch tests in bee workers showed no contact dermatitis reactions, a primary safety concern is the potential for allergic reactions in individuals with known allergies to bee products or pollen, which can range from mild irritation to severe anaphylaxis. Due to mild estrogenic activity, women with a history of breast or ovarian cancers are advised to consult a healthcare professional before using products containing royal jelly.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Royal Jelly Water is a valuable multi-functional ingredient, clinically shown to enhance hydration, support an even skin tone, and provide anti-aging and anti-inflammatory benefits, making it suitable for various skin types despite specific allergy considerations.
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