Food containing nitrates can greatly worsen a lung infection. Other foods that should be avoided include cruciferous vegetables and foods that contain sulfites, according to Everyday Health.
Any food that can cause a breathing difficulty must be avoided by those who have a lung infection. Minimizing salt intake and foods that cause excessive mucous production, such as milk, also helps while undergoing treatment. Any food that leads to acidity must also be avoided. This includes vegetables such as beans and cauliflower, sodas and sugary drinks, fried food and citrus fruits, such as oranges and lemons, notes Everyday Health. Sulfites can also be a trigger for people with sensitive bronchial passages and can lead to shortness of breath. Some examples of food containing sulfites are shrimp, potatoes, wine and beer, states Everyday Health.
According to a study published in the European Respiratory Journal, nitrates can exacerbate a lung infection if consumed in large quantities. Meats such as cold cuts, ham and bacon contain nitrates, and these must be avoided. Additionally, a diet high in salt can lead to the body retaining more water, which makes it difficult to breathe. The best diet to follow when suffering from a lung infection is one rich in antioxidants to help fight the damaging free radicals that cause disease and illness. Good hydration is also essential to fighting the infection effectively, according to Everyday Health.