NAC (n-acetyl-cysteine) What Is NAC? Are you looking to for a way to boost your antioxidant protection and stimulate detoxification? If so, NAC may be just what the Naturopathic Doctor ordered! N-acetyl Cysteine (NAC) is the supplemental form of the amino acid L-Cysteine. While L-cysteine is present in many foods, NAC can only be supplied via supplementation. NAC is a precursor to glutathione – which is one (if not THE) most important antioxidant. https://www.nationalnutrition.ca/amino-acids/single-aminos/nac-n-acetyl-cysteine.html #naccanada