Article: Efficacy of a soy moisturizer in photoaging: a double-blind, vehicle-controlled, 12-week study.(Clinical report)

Abstract

Serine protease inhibitors (soybean trypsin inhibitor [STI] and Bowman-Birk protease inhibitor [BBI]) found in soybeans have been shown to inhibit melanosome phagocytosis by keratinocytes via protease-activated receptor 2 (PAR-2). Preclinical studies have confirmed the skin lightening potential of these molecules. In this study, we investigated the efficacy of a novel soy moisturizer containing nondenaturated STI and BBI for the improvement of skin tone, pigmentation, and other photoaging attributes. Sixty-five women, with moderate facial photodamage, were enrolled in the 12-week, parallel, vehicle-controlled study. Efficacy was monitored through ...

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