Impact on facial skin aging signs of a 1-year standardized photoprotection over a classical skin care routine in skin phototypes II-VI individuals: A prospective randomized trial.

Abstract

Data reflecting the impact of photoprotection on cutaneous aging are scarce and mostly limited to fair skin. To assess the effectiveness of a photoprotective product in counteracting the photoaging process in different skin phototypes over 1 year compared against a classical routine. Two hundred and ninety Brazilian women aged 30-65 years, with skin phototype II-VI were equally randomized in two groups. Group 1 kept on their routine whereas Group 2 applied, twice daily, a photoprotective product (SPF 60, PPD = 24.1) replacing the one they routinely used. Volunteers reported the duration of their daily sun-exposure. Standardized photographs taken at D0 and D365 were analysed by 15 dermatologists to assess eight wrinkles and pigmentation signs. A global increase in severity was reported which was significant for Group 1. This increase was lower in Group 2 where only half the signs showed significant worsening. In Group 2 versus Group 1, the increase in forehead wrinkles, marionette lines, wrinkles created by ptosis and size of dark spot was significantly (p < 0.05) decreased by 30%-50%. Daily application of a high photoprotective product significantly decreases the progression of skin aging signs after 1 year in skin phototypes II-VI.