Effects of Ecological Environment on Physiological Indicators of Facial Skin in Hainan.

OBJECTIVE

To investigate the differences in facial skin physiological parameters among women living in distinct ecological environments across five regions of Hainan Province, China.

METHODS

A total of 140 healthy adult women (28 per city) from Haikou, Qionghai, Dongfang, Wuzhishan, and Sanya were recruited. Facial skin parameters, including hydration, transepidermal water loss (TEWL), sebum, elasticity, pH, and colorimetric indices (L, a, b*, ITA°), were measured using a non-invasive skin detector.

RESULTS

Higher concentrations of environmental pollutants (PM2.5, PM10, SO2, O3, CO, NO2) were significantly associated with increased TEWL, reduced skin hydration, and diminished elasticity (prolonged rebound time). Pollutants exhibited negative correlations with melanin, erythema, and the b* value (yellowness), but were positively correlated with brightness L* and ITA°.

CONCLUSION

Urban differences in facial skin barrier function and color were observed. Air pollutant levels in a specific area were significantly associated with impaired skin barrier and altered skin color among local residents. This study explores the correlation between air pollution and skin aging in a tropical population.