Research has found that asthma is essentially a chronic inflammatory condition, and thus treatment has begun to change accordingly, with a number of anti-inflammatory drugs being widely used. And further research in recent years has concluded that the underlying cause of asthma and other chronic lung diseases is similar and is caused by oxidation. As seen in the results of some clinical trials, asthmatic patients have a significant deficiency of antioxidants in the extracellular mucus layer of the lungs. These patients had low levels of the antioxidants vitamin C, vitamin E and ßcarotene in the mucus layer even when they were not suffering from an attack. In contrast, by-products due to oxidative stress leading to chronic inflammation and respiratory hyperactivity are high. Therefore, you should take care to supplement with antioxidant foods in the treatment of asthma. For example, it is important to add some low temperature pressed flaxseed oil or fish oil to supplement essential fatty acids (i.e., non-saturated fatty acids), which are important to enable the body to produce natural anti-inflammatory substances that help control inflammation. Eat more foods rich in various vitamins, which are found in many fruits and vegetables and are very easy to obtain in daily life. Not only is grape seed extract a good antioxidant substance, but it may also have anti-allergic properties. You can also take a strong antioxidant and mineral pill. Take some calcium and magnesium supplements. Magnesium helps relieve bronchospasm in the lung muscles. Since it is this spasm that causes the narrowing of the breathing passages, magnesium supplementation can help the airways expand.