N-Acetylcysteine (NAC) is an affordable supplement that supports glutathione production, immune function, lung health, and the body's natural antioxidant defenses. Explore how NAC helps clear respiratory mucus, manage inflammation, and protect cells from oxidative damage. The article also examines research into NAC's effects on cancer-cell metabolism, tumor growth, and blood-vessel formation, along with its place in Chef Janine's Clean Keto Approach to health and wellness.