Air pollution and vitamin D status


In response to the following comment: “Pollution levels are high in cities and clear, blue skies have become rare. I think the haze blocks a lot of the sun.”

There is a large literature on this issue; the following is one example: 

This study compared vitamin D status in 200, free-living, woman, aged between 20 to 55 years, from Tehran, a high-polluted area, and Ghazvin, a low-polluted area. Level of UVB (ultra-violet B – the part of the light spectrum the skin uses to make vitamin D) was measured; less UVB means more haze or more pollution. The average blood vitamin D levels were significantly higher in women from the low pollution area and was related to the degree of haze or pollution over these cities. 

“Therefore living in a polluted area plays a significant and independent role in contributing to vitamin D deficiency.”

“I spent 4 days in Tehran several years ago; believe me when I say that it is one of the most congested  and polluted cities I have ever visited. More importantly vitamin D deficiency and multiple sclerosis area major emerging problem in Iran.”

About the author

Prof G

Professor of Neurology, Barts & The London. MS & Preventive Neurology thinker, blogger, runner, vegetable gardener, husband, father, cook and wine & food lover.


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