Doctor?s Best NAC Detox Regulators support the production and utilization of glutathione the foremost protective and regulatory antioxidant naturally concentrated in all healthy cells.* NAC (N-Acetylcysteine) is proven to support glutathione production while selenium and molybdenum are essential for facilitating glutathione?s role in supporting energy production detoxification and other fundamental life processes.* At Doctor?s Best we lead with science. Our products are backed by research and crafted using pure ingredients carefully sourced from around the globe. Since 1990 we have dedicated ourselves to providing highly effective nutritional supplements that enable you to live a healthier lifestyle. We want nothing more than to see you and your family thrive!