Acetylcysteine, or N-acetylcysteine, commonly abbreviated as NAC, is the N-acetyl derivative of the protein amino acid L-cysteine. NAC is a delivery form of L-cysteine. L-cysteine is hygroscopic and slowly decomposes and oxidizes. NAC is more stable than L-cysteine, and it may be better absorbed. NAC is a reducing agent and has antioxidant activity. It is also a mucolytic and a hepatoprotectant, and it may have anti-apoptotic activity. It is necessary for the formation and healing of the skin. Hair and skin are made up 10-14% cysteine. Our catalyzed formula includes our phytogenic mineral catalyst for enhanced cellular uptake.