From the Manufacturer:
Give your liver a high-powered nutritional boost to help detoxify and energize your entire body with Swanson Ultra Cysteine Peptide. The amino acid cysteine plays a unique role in liver health, which ultimately produces a wide range of beneficial effects throughout the entire body. In the liver, cysteine is converted into glutathione, the body's most important cellular antioxidant and free-radical scavenger. Supplemental cysteine can dramatically increase glutathione levels to enhance the liver's detoxification capabilities. This activity not only promotes liver health, it can improve sleep quality, mental alertness and overall energy and vitality. Swanson Ultra Cysteine Peptide is the most stable and bioavailable form of supplemental cysteine on the market today. Derived from a 100% natural dairy source, it's a great way to improve the health of your liver and your whole body.