New York: Adding extra daily servings of fruits and vegetables didn`t improve lung function or other markers of lung health in people with chronic obstructive pulmonary disease (COPD) in a new study from Northern Ireland.The lung disease, which includes emphysema and chronic bronchitis, is one of the most common causes of death in the US, with a yearly death toll of more than 100,000.Previous research has shown that people who eat lots of fruits and veggies may have less severe lung symptoms, or be less likely to die from COPD -- possibly because of the antioxidants in that food group and its anti-inflammatory effects, the theory goes.But those studies were observational, meaning that scientists compared people who were already downing fruits and vegetables to those who avoided them. That kind of research doesn`t prove that nutritional habits, themselves, are driving lung changes, because scientists can`t take into account every other health and lifestyle variable that affects breathing and airway function.
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