To deliver oxygen to your lungs, the air you breathe must go on a long journey, traveling through your nostrils, sinuses, windpipe, bronchi, and bronchioles before finally reaching the alveoli (air sacs). Our Lung, Bronchial & Sinus Health formula supports all parts of your respiratory system, so you can breathe easy.* Lung, Bronchial & Sinus Health is a unique combination of modern nutraceutical ingredients, such as N-acetyl-L-cysteine (NAC) and bromelain, and age-old herbal support, including marshmallow, wild cherry, and ivy extracts.