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Low vitamin D levels associated with more asthma symptoms

Doctors were curious after noticing inner-city black children were often deficient in vitamin D and frequently had asthma.

In this study of 120 Baltimore-area children, ages 5 to 12, doctors periodically measured vitamin D levels, asthma symptoms, and took indoor air samples from children’s homes.

After nine months, overall, kids with low levels of vitamin D had more asthma symptoms than those with higher vitamin D levels.

In a surprising finding, obese children in homes with the highest air pollution benefited most from higher vitamin D levels reducing asthma symptoms.

Doctors said, in addition to indoor air pollution and low levels of vitamin D, the findings revealed a third factor in childhood asthma: obesity. Taking vitamin D supplements may be the easiest, safest way to increase levels of vitamin D for children in urban environments.