A study published in Thorax analyzed 50,000 children from around the world over a 10-year period and found that eating three or more burgers a week could boost a child's risk of having asthma. The risk was prevented or greatly lowered when the children were fed a diet rich in fruit, vegetables, and fish. Those foods are low in saturated fats and are packed with antioxidants and omega-3 fatty acids that have anti-inflammatory properties.
If you or your child have asthma and you eat fast food several times a week, I suggest trying to get more of the fish, fruits, and veggies into your diet. You just might breathe easier!