New Study Finds Correlation Between Air Pollution & Obesity

A new review summarises the epidemiological evidence for the correlation between exposure to various outdoor and indoor air pollutants (mainly particulate matter (PM), nitrogen oxides (NOx), ozone (O3), and polycyclic aromatic hydrocarbons (PAHs)) and overweight and obesity outcomes in recent years.

The study was executed by the researchers XiaoyiShi, YuxinZheng, Haiwen Gui, YuxiZhang, Minghui JiangFrom School of Public Health, Qingdao University,China.

The study discusses the multiple effects of air pollution during exposure periods throughout life and sex differences in populations.

This review also describes the potential mechanism underlying the increased risk of obesity caused by air pollution, including inflammation, oxidative stress, metabolic imbalance, intestinal flora disorders and epigenetic modifications.

Finally, this review proposes macro- and micro-measures to prevent the negative effects of air pollution exposure on the obesity prevalence.

According to the data reported by the Organization for Economic Co- operation and Development (OECD) in 2019, over half of the population in 94% of OECD member countries is overweight, and approximately one-quarter is obese (Cecchini and Vuik, 2019).

Based on BMI trends, the obesity prevalence is reaching pandemic levels globally (Lin and Li, 2021). As stated by the WHO in 2020, 38.9 million children under 5 years are overweight globally, while 340 million adolescents and 650 million adults worldwide are obese as well (Rahayu et al., 2021).

In Korea and Japan, the incidence is less than 6%, whereas it is greater than 30% in New Zealand, Mexico, and the United States (US).

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