NAC Detox Regulators with Seleno Excell from Doctor's BestBoosts glutathione production in the brain & liverSupports enzymes that neutralize natural and manmade toxinsNAC Detox Regulators with Seleno Excell from Doctor's Best supports the production and utilization of glutathione. NAC (N-Acetylcysteine) is proven to boost glutathione production in the brain, liver and other organs. This formula supports enzymes that neutralize natural and manmade toxins, and promotes the healthy functioning of numerous important proteins.These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.