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Facial Physiological Characteristics and Skin Microbiomes Changes are Associated with Body Mass Index (BMI)
Laiji Ma1, Huan Zhang1, Qingwen Jia2
1School of Perfume and Aroma Technology, Shanghai Institute of Technology, Shanghai, People's Republic of China.
Clinical, Cosmetic and Investigational Dermatology
|March 11, 2024
Summary
Higher body mass index (BMI) is linked to impaired facial skin barrier function and altered skin microbiome diversity in women. Increased BMI correlates with changes in facial skin pH, water loss, and microbial composition, including higher levels of certain bacteria and fungi.
Area of Science:
- Dermatology
- Microbiome Research
- Public Health
Background:
- Obesity is a global health concern with increasing focus on skin health.
- Limited understanding exists regarding the relationship between body mass index (BMI), facial skin physiology, and the facial skin microbiome in healthy women.
Purpose of the Study:
- To investigate correlations between BMI, facial skin physiological parameters, and facial bacteria and fungi.
- To analyze these relationships in 198 women aged 18-35 in Shanghai.
Main Methods:
- Categorized subjects into lean, normal, and overweight BMI groups.
- Measured facial skin physiological parameters using non-invasive instrumental methods.
- Analyzed skin microbiota (bacteria and fungi) via 16S rRNA and ITS high-throughput sequencing.
Main Results:
- Overweight individuals showed increased trans-epidermal water loss (TEWL), indicating impaired skin barrier.
- Higher BMI correlated with increased skin hemoglobin and decreased skin surface pH.
- Facial skin microbiome diversity (α-diversity) and species abundance increased in the overweight group, with higher abundances of Streptococcus, Corynebacterium, Malassezia, and Candida.
Conclusions:
- Body mass index (BMI) is associated with significant differences in facial skin biophysical properties and microbiome composition.
- Elevated BMI negatively impacts skin barrier integrity and alters the diversity and species composition of facial skin flora.
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