Is It Better to Take Glutathione or NAC? Understanding the Benefits of These Antioxidants Cymbiotika CYMBIOTIKA NAC stands for N acetylcysteine. It is a stable form of the amino acid cysteine. Your body uses it to make glutathione, one of your main antioxidants. Here is how it works and NAC is one of those supplements that I always have on hand. It's impressive how broadly supportive NAC is. One time I was taking NAC 500 mg every day for about two NAD vs NAC What are the Main Differences? Comparison Neurogan Health NAC (N Acetyl Cysteine) 1200 mg Superior Labs