What Is the Scientific Evidence for N-Acetyl Cysteine?
A double-blind, placebo-controlled clinical trial compared the effectiveness of NAC, Procysteine (a synthetic cysteine building-block drug), and placebo in 46 people with acute respiratory distress syndrome. 39 This catastrophic lung condition can occur when an unconscious person inhales a small amount of his or her own vomit. Both NAC and Procysteine reduced the severity of the condition in some people (as compared with placebo). However, overall it did not reduce the number of deaths.
