Thompson's One-A-Day Milk Thistle protects the liver and maintains digestive system health, based on traditional Western herbal medicine. Thompson's One-A-Day Milk Thistle 42000 contains a high strength milk thistle extract formulated for convenience with a One-A-Day dose. It is traditionally used in Western herbal medicine to: - Protect the liver and maintain healthy liver function - Support natural liver detoxification processes - Support bile production & promote flow from liver and gallbladder - Maintain digestive system health It is also used as a source of antioxidant to help reduce free radicals formed in the body and their damage to body cells.