Glutathione is a natural antioxidant that has the function of fighting against oxidative stress. It is a normally secreted substance by the human liver, and its main role as an antioxidant is to neutralize the effects of toxins or foreign molecules introduced into our bodies. With repeated exposure to stress, pollution and toxins, the body consumes a lot of glutathione to get rid of these toxins so it gets depleted. Replacement of lost or depleted glutathione can enhance the body’s ability to fight pollution and toxins. One of the very prominent examples of body’s exposure to pollutants and foreign substances is lung allergies or what is called bronchial asthma. Glutathione inhalation can improve the function of lung alveoli, improve lung function and reduce inflammation for patients with asthma. Glutathione inhalation is not only useful for asthma but many other inflammatory lung conditions such as chronic bronchitis, smoking-induced lung injuries, and early stages of emphysema or COPD.