Many people returning from military deployment have developed asthma as a result of inhaling hazardous materials. Exposures to diesel, burn pits, biomass smoke and sandstorms during deployment likely play a role. Some people with deployment-related asthma do not respond well to standard asthma medications.
In this study, researchers are investigating whether a supplement called L-citrulline will help improve asthma symptoms and lung function for veterans with deployment-related asthma. Over several weeks, participants will be provided with L-citrulline supplements and a placebo powder (without knowing which they are taking first) and tested to see if there is any change in lung function.