Air pollution has long been blamed for damaged lungs and strained hearts. Now, new research suggests it may also raise the risk of type 2 diabetes — and South Asia is among the regions most affected. The finding arrives just as the world marks World Diabetes Day on November 14, under this year’s theme of early action on diabetes.
The analysis, published in the Journal of Vascular Diseases, pulled together 13 major reviews covering more than 200 million participant observations from around the world. For every rise of 10 micrograms per cubic metre in fine particulate matter, known as PM2.5 — the tiny particles that slip deep into the lungs — the risk of developing type 2 diabetes rose by 10 to 16 percent. In South Asian populations in India, Bangladesh and Sri Lanka, the same rise was linked to a 9 percent higher risk.
The researchers stressed that the pattern is an association, not proof that pollution directly causes diabetes. But they argue the consistency across so many studies means clean air should now be part of diabetes prevention. Air quality management, they said, must become a core part of how countries fight diabetes, alongside diet and exercise.
The timing is stark. Delhi’s air quality slipped into the “very poor” category on November 11, with the 24-hour average air quality index settling at 313. More than 100 million people in India already live with diabetes. Nationwide figures put adult diabetes prevalence at 11.4 percent, with a further 15.3 percent living with prediabetes.
Globally, more than 40 percent of people living with diabetes remain undiagnosed, and up to half of people with type 2 diabetes already have complications by the time they are diagnosed. South Asians also tend to develop the condition at younger ages and at lower body weights than many other populations, which makes early checks especially important.
Staying healthy: five habits that help
- Get checked before symptoms appear. Type 2 diabetes can develop quietly for years, so a simple blood sugar test is worth doing — especially if diabetes runs in your family or you carry weight around your waist. Ask your doctor how often you should be screened.
- Build your plate around fibre. Dal, beans, vegetables and whole grains help steady blood sugar. Choose whole fruit instead of juice, and water instead of sugary drinks and packaged juices.
- Move every day. Aim for around 150 minutes of brisk walking a week, plus some muscle-strengthening activity on two days. Breaking up long stretches of sitting also helps.
- Mind the air you breathe. Check the air quality index before outdoor exercise, and on very poor air days move your walk or workout indoors, or go out earlier in the morning when the air is usually cleaner.
- Protect your sleep. Poor sleep is linked to blood sugar trouble, so aim for seven to eight hours a night and keep a regular bedtime where you can.
This article shares general health information only and is not medical advice. Speak to a healthcare professional about your own risk, screening and care.
