Background: We evaluated the ability of quercetin, a natural antioxidant formulated in a specific delivery system, to reduce skin inflammation induced by a variety of stimuli, including UV radiation, stimulation with a histamine solution, or contact with chemical irritants. In particular, we tested the soothing and anti-itch effect of QuercevitaÂ®, 1% cream for external use, a formulation characterized by a phospholipids-based delivery system. Patients and methods: The study was a monocentric, single blind trial that enrolled a group of 30 healthy volunteers. The back of each subject was examined to identify four quadrants with no previous skin damage or naevi that were treated in order to induce a controlled and reversible form of skin stress. The areas were treated as follows: no product; QuercevitaÂ® 1% cream, 2 mg/cm2; placebo; positive control (a commercially available topical formulation containing 1% dexchlorpheniramine). Results: Only quercetin phospholipids 1% and dexchlorpheniramine 1% achieved a significant reduction in erythema with comparable results: (â10.05% [P=0.00329] for quercetin phospholipids 1% vs â14.05% [P=0.00046] for the positive control). Moreover, quercetin phospholipids 1% and dexchlorpheniramine 1% were both associated with a significant decrease in mean wheal diameter: (â13.25% and â12.23% for dexchlorpheniramine 1%, respectively). Similar findings were reported for the other tested parameters. Conclusion: Quercetin has a skin protective effect against damage caused by a variety of insults, including UV radiation, histamine, or contact with toxic chemical compounds. Indeed, quercetin is able to reduce redness, itching, and inflammation of damaged skin; it may also help restore skin barrier function, increasing hydration, and reducing water loss.
|Titolo:||Soothing and anti-itch effect of quercetin phytosome in human subjects: A single-blind study|
|Data di pubblicazione:||2016|
|Appare nelle tipologie:||01.01 - Articolo su rivista|
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|Maramaldi-2016 soothing-and-anti-itch-effect-of-quercetin-phytosome-in-huma_022616.pdf||Documento in versione editoriale||Open Access Visualizza/Apri|