Swanson Premium Brand. GREAT ANTIOXIDANT SUPPORT FOR YOUR LIVER - Free radicals can cause oxidative damage to your liver, but NAC is necessary for the regeneration of glutathione, a potent antioxidants that binds with and neutralizes free radicals. NAC is the stable form of the amino acid L-Cysteine and works to stabilize the formation of protein structures, which supports cellular health. DELIVERS 600MG OF ACETYL CYSTEINE - NAC has earned a reputation as a free radical scavenger due to its ability to promote glutathione preservation, which helps prevent oxidative damage while also having an antiaging effect. TERRIFIC DETOX SUPPORT - The thiol groups within NAC help to fight against toxins or environmental pollutants, and works to inactivate them. OUR QUALITY COMMITMENT: For nearly 50 years, Swanson has delivered science-backed health products worldwide. Each wellness supplement is made in our GMP certified facilities, and our purity and potency testing includes independent third-party labs. MONEY BACK GUARANTEE: At Swanson, we guarantee that every health product is made from the purest, freshest ingredients. If you aren't satisfied with any product(s) purchased within the last 30 days, return the unused portion to us for a full refund.