No wonder West Indians had a rough time when they moved to the UK in the mid-twentieth century: with the polluted atmosphere common at that time many suffered from a vitamin D deficiency. Their children born in the UK had more problems than their parents because growing up in a sun depleted climatic environment with a dark skin led to long term lung problems. Australian research shows the lack of vitamin D leads to altered lung structure, with the lungs partially shutting down. In adult life people of West Indian heritage have decreased lung function. Mice were tested with some being made deficient in vitamin D while others had an adequate level. Tests with a plethysmograph showed lung obstruction was markedly greater in mice lacking vitamin D. Overall, lung volume was reduced. Lungs were also smaller than average. It was unclear as to whether the problem was basically due to heritage, or mothers being deficient during pregnancy, because test mice had to be bred to have low sun-to-vita...
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