Hydrating Foods and DrinksStaying hydrated is crucial to overall good health. “Water is essential in a lot of different body processes, so being hydrated helps our organs function properly,” says Romano. “In patients with COPD this is especially important because they have organs that are under more stress.”COPD patients also tend to produce a lot of phlegm and other secretions. Good hydration will help thin the mucus in your airways and make it easier to clear your lungs, Romano adds.The ALA recommends people with COPD drink six to eight glasses of water per day, ideally spread throughout the day to avoid overfilling the stomach.[0]Not a fan of plain old H20? You can also get your fill of fluids by drinking any healthy, caffeine-free fluid. This includes herbal teas and juices. Eating fruits and vegetables also offer a substantial amount of water, says Romano.Cucumbers, celery, and watermelon are among the most hydrating foods.But keep in mind that some people with COPD who also have heart problems might need to limit their fluid intake. If you are not sure whether you have fluid restrictions, check with your doctor.