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Int J Cosmet Sci. 2016 Jun;38(3):217-23. doi: 10.1111/ics.12270. Epub 2015 Oct 5.

Consequences of urban pollution upon skin status. A controlled study in Shanghai area.

Author information

  • 1L'Oreal Research & Innovation, 11-13 rue Dora Mar, 93400, Saint-Ouen, France.
  • 2L'Oreal Research & Innovation, 188 rue Paul Hochart BP 553, 94152, Chevilly-Larue, France.
  • 3L'Oreal Research & Innovation, No. 550 JinYu Rd., Pudong New Area, Shanghai, China.

Abstract

OBJECTIVE:

After preliminary studies aimed at measuring pertinent biochemical parameters, potentially modified in subjects exposed to bad environmental conditions, a dedicated study was performed in Shanghai city to evaluate the effect of Urban pollution upon human skin and to collect feedback from the volunteers under study.

METHODS:

This study was performed during summer 2008 in two different districts of Shanghai, on 159 local residents: 79 subjects from Xu Jia Hui (a centre Shanghainese area), more exposed to pollution, and 80 subjects from Chong Ming, an agricultural region closely located north of Shanghai (<100 kms) and less exposed to pollution, according to official data. Biochemical parameters were measured on skin, and feedback from volunteers was collected through a graduated 'Likert scale' questionnaire under a point scale (strongly agree, agree, disagree, strongly disagree and none).

RESULTS:

The study demonstrated significant differences in several biochemical parameters measured in Chong Ming area, as compared to Urban area, with an increased ratio of squalene/lipids, a lower level of lactic acid and a better cohesion of stratum corneum. Both sebum excretion rate and sebum casual levels did not differ between the two districts. The volunteer's feedback evidenced a perceived link between pollution and their skin problems.

CONCLUSION:

This study demonstrated a significant impact of the pollution upon the skin status, as illustrated by changes in superficial biochemical parameters and volunteers' perception.

KEYWORDS:

biochemical analysis; environmental pollution; multicentre clinical study; skin physiology

PMID:
26291783
DOI:
10.1111/ics.12270
[PubMed - in process]
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