Collagen supplements are taken in one of two different forms, either in the form of hydrolyzed collagen or in the form of an undenatured type II collagen; both forms have different dosing strategies and while their benefits may share some similarities can be considered two different supplements.
Other tests, including imaging (see Chest Imaging), bronchoscopy (see Bronchoscopy), and thoracoscopy (see Thoracoscopy), allow doctors to determine the specific cause of a lung disorder.
To diagnose COPD, your doctor will probably do the following tests: 1  Medical history and physical exam. These will give your doctor important information about your health. 2  Lung function testsLung function tests, including an FEV1 test. These tests measure the amount of air in your lungs and the speed at which air moves in and out.