N-Acetyl Cysteine (NAC) is a modified form of the essential amino acid L-cysteine, which is a precursor to the antioxidant enzyme glutathione . Commonly referred to as the “mother” of all antioxidants, glutathione plays an extremely important role in the immune system as it is largely responsible for maintaining our cells’ oxidative balance. Due to its high bioavailability NAC is reported to directly affect glutathione levels in the brain by crossing the blood-brain barrier, an action that a basic glutathione supplement is unable to do alone . While your body does produce glutathione on its own, it’s believed that stress and external exposures may deplete the production of this vital antioxidant . L-cysteine is the often limiting factor in glutathione production, and NAC may be one of the more efficient methods to balance the scales .
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