Zahler's Milk Thistle helps support healthy liver cells and the body’s natural repair processes. It is essential for digestion, detoxification, blood sugar regulation and fat metabolism, and supports many organs in the body. More about Milk Thistle: Milk Thistle is a powerful liver tonic and detoxifier with 80% Silymarin. It helps repair existing liver cells and keeps newly regenerated liver cells from being destroyed by toxins. As a powerful antioxidant, Milk Thistle greatly improves the performance of the liver’s crucial functions.