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Vitamins & Minerals
N-Acetyl cysteine (NAC) is an altered form of the amino acid cysteine, which is commonly found in food and synthesized by the body.
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Although a great deal of research has shown that NAC has antioxidant activity, one small study found that daily amounts of 1.2 grams or more could lead to increased oxidative stress. Extremely large amounts of cysteine, the amino acid from which NAC is derived, may be toxic to nerve cells in rats.
NAC may increase urinary zinc excretion. Therefore, supplemental zinc and copper should be added when supplementing with NAC for extended periods.
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