NAC (N-Acetyl-L-Cysteine) is an important precursor to glutathione. Glutathione is an endogenous antioxidant produced by the human body. It is used for protecting the heart, brain, lungs, liver & other organs. Glutathione is poorly absorbed in the intestinal tract while NAC is highly absorbable. Daily NAC is a great way to improve glutathione status in the body. One tablet provides N-Acetyl-L-Cysteine 600mg & Organic Garlic Extract 50mg.