Dr. Stephen Lynch, President of Medical Staff, Phoenix City of Hope Your Guide To Glutathione Radiance Functional Medicine Seeking Health Optimal Liposomal Glutathione, Reduced Antioxidant Liquid Supplement, Mint, 100 mg, 4 fl oz (120 ml) Walmart.com NAC is an effective, inexpensive supplement. The key is to know why to use itand when. It's also key to know when to stop. Taking too much of anything isn't good. Take David J. Lynch, MD Mullica Hill, NJ General Surgery, Phlebology, Venous and Lymphatic Medicine Request Appointment NAC is a great supplement. It's awesome stuff to support healthy lungs. NAC is a known mucolytic. That is a fancy term meaning breaking up mucus. Now, research does show that NAC