With Artichoke & Dandelion Silymarin (Silybum marianum), also known as Milk Thistle, has been used by traditional herbalists for centuries. Scientific studies have indicated that constituents in Silymarin may help to support healthy liver function. This vegetarian formula also includes Artichoke & Dandelion for additional support. NOW Double Strength Silymarin has twice the Milk Thistle Extract (300 mg per capsule) as in our regular strength product (150 mg per capsule).