It would seem, according to the journal of Pediatric Allergy and Immunology, that children with diets over 40 grams (1/3 cup) of 'fruity vegetables' such as cucumber, tomato, eggplant, green bean and zucchini, were less likely to suffer with symptoms of childhood asthma.
The study, which was conducted on 460 children in Menorca, Spain from birth to age 6 and 1/2 years, also showed that children who ate 60 or more grams (about 2 ounces) of omega-3 containing fish were less likely to suffer 'atopy' - inherited childhood allergies.
It is believed that due to the high antioxidant and anti-inflammatory nature of the vegetables and fish, these foods produce a protective and healing effect on the bronchial passageways.
According to the lead author of the study, Dr. Leda Chatzi, "The biological mechanisms that underlie the protective affect of these foods is not fully understood, but we believe that the fruity vegetables and fish reduce the inflammation associated with asthma and allergies."
Although fish oil, liquid or capsule forms, are a good start to acquiring their studied 60 grams a day, they contain only around 1.5 to 3 grams per teaspoonful; cod liver oil a bit less. Higher quantities of omega-3's will be obtained by actually eating fatty fish such as salmon, albacore tuna, sardines, herring and anchovy.