Poor Diet May Affect Teen Asthma
Asthma and Diet Study Links Poor Eating Habits to Asthma Symptoms in Teens
July 9, 2007 -- New research on asthma and diet shows that teens with poor
diets may be more likely than their peers to have asthma symptoms and worse
The findings come from a study of some 2,100 teens in 12 U.S. and Canadian
In a nutshell, the teens with less than ideal diets were the most likely to
have poorer lung function -- including asthma symptoms -- than their peers.
On the flip side, those eating plenty of fruits, vegetables, and omega-3
fatty acids (found in salmon and other fatty fish, walnuts, flaxseeds, and
other foods) tended to have better lung function.
The researchers included Jane Burns, ScD, of the Harvard School of Public
"I wish I could say that an apple a day can keep asthma away, but it's a
complex disease with a genetic component," Burns says in a news
"However," she says, "it may be that certain foods can lessen or
prevent asthma symptoms. The most important thing to remember is that diet can
have a significant impact on teens' respiratory health. I would encourage them
to make healthy eating a part of their routine, and stress to them that smoking
The study appears in July's edition of the journal Chest.
Asthma and Diet in Teens
The teens took lung function tests and completed surveys about their eating
habits, exercise, smoking, medications, asthma, and other respiratory problems,
including chronic bronchitis and wheezing.
Teens with good diets were few and far between. For instance, 86% of the
teens admitted not eating at least five daily servings of fruits and
Thirty percent of the students were overweight, 9% had asthma, 24% were
smokers, and 11% took multivitamins.
Students who skimped on fruits, vitamins C and E, and omega-3 fatty acids
were particularly likely to have poorer lung function and asthma symptoms,
especially if they were smokers.
The study doesn't show which came first -- poor diets or poor lung function.
It also doesn't rule out other influences, such as the teens' social and
economic backgrounds, or their eating habits as children.