Impact of Urban Pollution and Chronic Sun-Exposure on Skin Ageing in Chinese Women

The study "Impact of urban pollution on top of chronic sun-exposure on skin ageing in Chinese women" involved 301 women aged 20-80 years and 202 women aged 20-45 years from different urban environments in China. The research found that urban pollution significantly accelerates the onset of facial wrinkles and increases pigmentation severity after 30 years of age (p<0.001). UV-exposure significantly impacts facial wrinkles and pigmentation from 20 years of age (p<0.001). The impact of pollution increases with each 5-year cluster after 30 years (p<0.01), remaining lower than that of UV until 40 years (p<0.01). At 45 years, no significant differences in the increased wrinkle rate and severity of pigmentation were observed, however, with a higher value for pollution. The study concludes that while chronic sun-exposure impacts skin ageing from 20 years, pollution becomes a significant factor after 45 years.