N-Acetyl-Cysteine (NAC) is a precursor to the essential sulfur-containing amino acid L-cysteine. L-cysteine is naturally found in high-protein foods such as eggs, chicken and turkey. Often referred to as the building blocks of protein, amino acids like cysteine are essential to body function and help with various processes such as building muscle or regulating immune function. Prairie Naturals NAC 1000 is sourced from non-GMO corn.
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