Showlu Organic Mullein Leaf & Marshmallow Root Respiratory Health DropsUSDA Organic Respiratory Health Liquid Drops: If your respiratory system is occasionally irritated by dry air or other minor nuisances, reach for this blend of Mullein Leaf (Verbascum thapsus) and Marshmallow Root (Althaea officinalis) to soothe and support keeping your respiratory system happy and healthy! Mullein Leaf Blend: The respiratory system is a system of great importance in our overall health. Not only does it aid in our bodys air exchange