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Home → Science → News

Mediterranean diet may reduce negative effects of air pollution

Want to help your body fight pollution? Cut down on the meat and dairy, eat some more fruits and veggies!

Mihai Andrei by Mihai Andrei
May 21, 2018
in Health, News, Nutrition

Add one more thing to the already impressive list of benefits the Mediterranean diet offers: it helps your body fight air pollution.

Mediterranean diet may blunt air pollution’s ill health effects. Image credits: ATS.

The Mediterranean diet is not so much a diet as it is a lifestyle. It varies from one country to another so you might find it in various forms, but the general idea is: high in vegetables, fruits, legumes, nuts, beans, cereals, grains, fish, and unsaturated fats such as olive oil, low in meat and dairy foods.

There is a hefty amount of research showing that the Mediterranean diet reduces the risk of developing conditions like type 2 diabetes, high blood pressure, and raised cholesterol, which are all risk factors for heart disease and cancer. The Mediterranean diet also seems to be associated with a longer and a healthier life. But, in this case, researchers wanted to look at something else.

They analyzed data from the National Institutes of Health (NIH)–American Association of Retired Persons Diet and Health Study. Over 17 years, the study followed 548,699 people (average age 62 at enrollment) from 6 states — California, North Carolina, New Jersey, Florida, Louisiana and Pennsylvania–and two cities–Atlanta and Detroit.

As expected, they found that an increase in different types of air pollution leads to a myriad of negative health effects. However, interestingly, they found that sticking to the Mediterranean diet seems to protect from these negative effects, something which researchers attribute to the high level of antioxidants in the preferred foods.

“Previous studies have shown that dietary changes, particularly the addition of antioxidants, can blunt the adverse effects of exposure to high levels of air pollution over short time periods,” said Chris C. Lim, MS, a doctoral student at the NYU School of Medicine. “What we did not know was whether diet can influence the association between long-term air pollution exposure and health effects.”

However, one thing which the diet doesn’t seem to impact is ozone, and researchers suspect that this happens because ozone affects the human body through a different mechanism.

“Given the benefits we found of a diet high in anti-oxidants, our results are consistent with the hypothesis that particle air pollution caused by fossil fuel combustion adversely affects health by inducing oxidative stress and inflammation,” said senior study author George Thurston, ScD, director of the Program in Exposure Assessment and Human Health Effects at the Department of Environmental Medicine, NYU School of Medicine. “On the other hand, the ozone effect was not significantly blunted by a Mediterranean diet, so ozone apparently affects cardiac health through a different mechanism.”

Results will be presented at the ATS 2018 International Conference.

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