Pure Encapsulations NAC 600 mg 90 Capsules Vitacost Gly NAc Caps 1.6 grams of N Acetyl Cysteine + Glycine per Serving Myoxcience Effect of N Acetylcysteine on Sleep: Impacts of Sex and Time of Day NAC Antioxidant & Detox Support Allergy Research Group As I mention in my book, N acetyl cysteine (NAC) is not found in food sources, but in the body, it converts into cysteine. NAC acts as a precursor to glutathione, a powerful DID YOU KNOW NAC is a precursor to glutathione, the master antioxidant? This means it boosts your body's natural detox abilities, combats oxidative stress, and promotes overall immune health. Support your body