In his study, Nancy E. Lange, MD, MPH, of the Channing Laboratory, Brigham and Women's Hospital studied 626 Caucasian men over a period of 20 years. The study assessed three time periods are completely different between 1984 and 2003. Pulmonary function of each participant was measured using a spirometer.
"Our results indicate that vitamin D may modify the damaging effects of smoking on lung function. This effect might be due to vitamin D has anti-inflammatory properties and anti-oxidants,"said Lange.
This study has several limitations, including the observational information. Vitamin D levels are also likely to vary from time to time. Another limitation of this study involved only older men.
Alexander C. White MS, MD, chairman of the committee of the American Thoracic Society Tobacco Action, said: enough or not vitamin D levels in a person, should not overshadow the health risks and dangers associated with smoking. Those who smoke should be aware of the consequences of health problems that may be obtained.
The study is published in the American Journal of Respiratory and Critical Care Medicine.