Europe-wide research has claimed that children who are brought up on a Mediterranean-style diet with plenty of fish, fruit and vegetables have less chance of developing asthma.
The risk, however, can be increased when a child eats three or more burgers in a week, although this could also be linked to other unhealthy habits, according to the study.
Researchers from the UK, Germany and Spain looked at data gathered from 50,000 children aged eight to 12 from between 1995 and 2005. The study considered the effect diet had on allergies among the youngsters, who were from 20 different countries.
Children in both affluent and poorer countries were protected against wheezing and asthma by a diet rich in fruit. Diets rich in fish and vegetables were also shown to have a positive effect. The experts found diet did not increase the risk of allergies to grass and tree pollen.
In the journal, Thorax, the authors said: "In particular, foods rich in vitamin C have been reported to relate to better lung function and fewer asthma symptoms."
"I have suffered from severe asthma from birth; 30 years ago I gave up eating meat, since then I have not had a severe asthma attack, the only time I may be a bit wheezy is during the hayfever season, I eat a diet of fish and veg. It has worked for me" - BA Richardson, Essex
"I think it's all about more junk food. Children are eating more and more junk food. They all are unknown about it. That's why it's all happening out there" - Jyoti Chhetri