Science
Mechanism of Action
This extract functions as a powerful antioxidant, attributed to its rich content of vitamin C, flavonoids, and polyphenols, which effectively neutralize free radicals and mitigate lipid peroxidation to protect skin from environmental aggressors and premature aging. It exerts anti-inflammatory effects by reducing pro-inflammatory mediators such as nitric oxide (NO), prostaglandin E2 (PGE2), TNF-α, IL-6, and IL-1β, while suppressing iNOS and COX-2 expression, potentially via NF-κB and MAPKs pathways. The ingredient also provides anti-aging benefits through the inhibition of MMP-1 (a collagen-degrading enzyme) and by regulating procollagen type I α1 expression. Its vitamin C content can further stimulate collagen production and enhance skin luminosity, contributing to improved skin texture and hydration. Additionally, it may support skin barrier function and keratinocyte differentiation, and components like rose essential oils can offer astringent properties, helping to tighten the skin and minimize the appearance of pores.
Research
Clinical Evidence
Medium confidenceN/A
Key findings
- 01 Studies on isolated compounds (Rosarugosides D and A) from Rosa rugosa flower buds demonstrated a significant reduction in intracellular Reactive Oxygen Species (ROS) production in TNF-α-induced Human Dermal Fibroblasts (NHDFs) at concentrations ranging from 0.03-100 µM. No toxicity was observed below 10 µM for these compounds or the extract.
- 02 Rosarugoside A was shown to significantly decrease matrix metalloproteinase-1 (MMP-1) secretion, while Rosarugoside D regulated the expression of procollagen type I α1, suggesting robust anti-skin-aging potential.
- 03 An in vitro study utilizing a standard Rosa rugosa flower extract (PRE) at 50 mg/mL significantly reduced the production of inflammatory mediators (NO, PGE2) and cytokines (TNF-α, IL-6, IL-1β), alongside suppressing iNOS and COX-2 protein expression in LPS-stimulated RAW264.7 macrophages, confirming anti-inflammatory effects.
Transparency
Dusting Analysis
While specific efficacy thresholds for topical application are not clearly defined, EU cosmetic regulations stipulate that 'Rose Flower Oil/Extract' (which includes Rosa rugosa components) requires specific labeling if its concentration exceeds 0.001% in leave-on products and 0.01% in rinse-off products. Formulators may choose to formulate below these thresholds to avoid additional labeling requirements, potentially leading to 'dusting' and underutilization of its full beneficial potential if higher concentrations are more efficacious.
The Formula
Formulation
Conflicts
- Concentrations exceeding 0.001% in leave-on products and 0.01% in rinse-off products necessitate specific labeling under EU cosmetic regulations due to potential sensitizers derived from rose essential oil components.
- Patch testing is advisable for individuals with sensitive skin, mirroring recommendations for products containing essential oil components.
Safety
Safety Profile
Generally well-tolerated by most skin types, including sensitive skin. However, the European Cosmetics Regulation 1223/2009 mandates specific ingredient list indications for 'Rose Flower Oil/Extract' (which may contain Rosa rugosa components) if concentrations surpass 0.001% in leave-on products or 0.01% in rinse-off products, due to potential sensitizers within essential oil components. The EWG Skin Deep database rates Rosa Rugosa Flower Extract as 'LOW' for concerns like cancer, allergies & immunotoxicity, and developmental toxicity.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Rosa Rugosa Flower Extract is a valuable ingredient, offering broad benefits including antioxidant defense, anti-inflammatory action, and anti-aging properties, suitable for a range of skin types, though regulatory labeling for essential oil components requires formulation consideration.
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References
Sources