NAC shows up in more respiratory and general-wellness formulas than almost any other compound. Here's what it actually is.
NAC (N-Acetylcysteine) is a precursor to glutathione, one of the body's primary antioxidants, involved in cellular protection throughout the body, including lung tissue.
NAC has one of the longer research histories among supplement compounds studied in general respiratory and antioxidant contexts, making it a common anchor ingredient.
NAC can have mild blood-thinning properties, so anyone on prescription anticoagulants should talk to a doctor before adding it to their routine.