Opti-NAC supplements your body's levels of N-Acetyl-L-Cysteine (NAC). NAC is an amino acid that aids in the production of your body's most powerful antioxidant Glutathione. This vital antioxidant is an essential component in the body's natural detoxification process which supports increased liver detoxification, lung health, and post-workout muscle recovery. NAC is also beneficial in the protection of the body against normal exposure to harmful heavy metals.