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Air pollution exposure found to be risk factor for type 2 diabetes

Exposure to air pollution increases the risk of developing insulin resistance as a pre-diabetic state of type 2 diabetes, according to a new study by scientists of Helmholtz Zentrum München, in collaboration with colleagues of the German Center for Diabetes Research (DZD). The researchers reported these results in the journal Diabetes.

Whether diabetes becomes manifest and when this occurs is not only due to lifestyle or genetic factors, but also due to traffic-related air pollution, said Professor Annette Peters, director of the Institute of Epidemiology II at Helmholtz Zentrum München and head of the research area of epidemiology of the DZD.

… our results point to an association between traffic-related air pollution and biomarkers related to insulin resistance, subclinical inflammation and adipokines in the general population. The effect estimates were remarkably high for individuals with i-IFG or i-IGT or both suggesting this subgroup to be particularly susceptible for adverse health effects due to air pollution exposure.

—Wolf et al.

For the current study, the team analyzed the data of 2,944 participants of the KORA (Cooperative Health Research in the Region Augsburg) F4 study conducted in southern Germany (2006-2008).

They analyzed associations between individual air pollution concentration estimated by land use regression and HOMA-IR (homeostasis model assessment-estimated insulin resistance), glucose, insulin, HbA1c (glycated hemoglobin), leptin, and hs-CRP (high-sensitivity C-reactive protein) from fasting samples using multivariable linear regression models. Effect estimates were calculated for the whole study population and subgroups of non-diabetic, pre-diabetic and diabetic individuals.

Among all participants, a 7.9μg/m3 increment in particulate matter <10 μm was associated with higher HOMA-IR (15.6% [95%-CI: 4.0;28.6]) and insulin (14.5% [3.6;26.5]). (HOMA-IR has also been shown to be an independent predictor of cardiovascular disease (CVD) in type 2 diabetes.)

Nitrogen dioxide was associated with HOMA-IR, glucose, insulin, and leptin. Effect estimates for pre-diabetic individuals were much larger and highly statistically significant, while non-diabetic and diabetic individuals showed rather weak associations. No association was seen for HbA1c.

The results revealed that people who already have an impaired glucose metabolism, so-called pre-diabetic individuals, are particularly vulnerable to the effects of air pollution. In these individuals, the association between increases in their blood marker levels and increases in air pollutant concentrations is particularly significant! Thus, over the long term—especially for people with impaired glucose metabolism—air pollution is a risk factor for type 2 diabetes.

—Dr. Kathrin Wolf, lead author of the study

The authors are also concerned that the concentrations of air pollutants, though below EU threshold values, are still above the proposed guidelines of the World Health Organization (WHO). As a consequence, they demand changes in government policy. Moreover, the association between increased exposure to air pollution and respiratory and cardiovascular diseases has now been clearly established.

Next, the scientists want to investigate the influence of ultrafine particles.

A previous study of Helmholtz Zentrum München from 2013 showed that ultrafine particulate air pollution increases the risk of insulin resistance in childhood. In a meta-analysis from 2015 the same authors concluded that there is an association between long-term exposure to air pollutants and the development of type 2 diabetes.


  • Kathrin Wolf, Anita Popp, Alexandra Schneider, Susanne Breitner, Regina Hampel, Wolfgang Rathmann, Christian Herder, Michael Roden, Wolfgang Koenig, Christa Meisinger, Annette Peters, KORA-Study Group (2016) “Association between long-term exposure to air pollution and biomarkers related to insulin resistance, subclinical inflammation and adipokines,” Diabetes doi: 10.2337/db15-1567



You mean....breathing toxic SHYT spewed into the air by billions of vehicles isn't good for us??? Say it isn't so!!!!!


Lol ... spot on Dave. As the insidious effects of the less-obvious pollutants such as ultrafines becomes obvious, we may well come to regard this period in a similar way to the notorious London pea soup fogs ie outright killers.


Wonder how many extra Diabetes II cases in Mexico City, LA, Peking, HK, and many other highly polluted large cities?

Added to Heart disorders, Brain disorders, Lung cancers, etc +++ pollution from our ICEVs and CPPs is doing very well for corrective medicine + pharma people?


I mean seriously, we have to face the fact that we breathe poison every day of our lives. It's just a matter of which way it will affect your health and when.

But half of America is so moronic we still don't believe it has anything to do with climate change or health issues. Sigh.

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