From the Manufacturer:
Supports healthy liver function. With nature's help, Neways has formulated Protectiver to help support the normal healthy detoxification processes of the liver. Protectiver is a source of antioxidants that helps to reduce the oxidisation of proteins, lipids, hormones and other substances. With its prime ingredient of St Mary's thistle, which has a long history of medicinal use associated with liver health, it can help to support the normal healthy regenerative ability of the liver and assist with the maintenance of healthy liver function. As a source of antioxidants, it can help to counteract the production of harmful free radicals.