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Eat Right and Breathe Easy


"Overall, it gives us another reason that eating fruits and vegetables is good," Hu tells WebMD. "The magnitude of effect is very strong, very significant" in the study, he says.

While the evidence regarding diet was encouraging, taking vitamin supplements did not seem to make a difference, Hu adds.

Why? One reason, says Hu, may be because people generally take vitamins when they are unhealthy. "So you may find that people who use supplements have lower lung function than those who did not."

He says that survey questions were too broad to provide a cause-and-effect between vitamins and lung protection. Questioners only asked whether vitamin supplements had been taken within the past month. "That reflects only recent intake but does not reflect long-term intake. [They] may have started taking because having a health problem," Hu says.

Lou Ann Brown, PhD, says that while you can't reverse lung disease by eating right, you may be able to prevent further decrease in lung function as you age. "Eating right can decrease the aging process of the lung by four years because antioxidants provide protection from pollutions in air. Particularly in metropolitan areas, we have lots of ozone and fumes and oxygen radicals in the air from everything," she tells WebMD. Brown, a biochemist and associate professor of pediatrics at Emory School of Medicine, has herself researched the issue.

"What mamma told you was right. Eat your fruits and vegetables," she says. "There probably are other protective agents we're not aware of yet that are in fruits and vegetables, and by just taking supplements, you don't get those. The National Institutes of Health says eat five fruits and vegetables a day, so this is in keeping with that policy."

Vital Information:

  • Chronic obstructive lung disease, or COPD, results in progressive lung damage with gradual loss of lung function. As healthy lung tissue is lost, the disease becomes irreversible. The main cause of the disease is smoking.
  • Antioxidant vitamins may help protect lung function in patients with COPD, but these vitamins must come from the diet, not supplements, to be effective, according to new research.
  • Vitamin C, vitamin E, carotene, and selenium showed some protective effect on the lungs, but smokers can reverse the disease entirely by quitting during the early stages.



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