NAC Pro® (N-Acetyl Cysteine) is a nutritional supplement that contains 180 veggie capsules, a clean and effective natural medicine developed by Dr. Dale in 1991. Dr. Dale's formulations prioritize the absence of flow agents, preservatives, artificial colors, flavors, and GMOs to ensure products that "do no harm." NAC Pro® provides 650 mg per capsule of N-acetyl cysteine, a derivative of the endogenous amino acid L-cysteine and a precursor of the antioxidant enzyme glutathione.