Supports Liver Health Milk Thistle Extract Plus Natural Herb Dietary SupplementYerba Prima Liv-Cleanse ingredients provide proven support for normal, healthy liver function. Yerba Prima Liv-Cleanse contains 100 mg per tablet of milk thistle seed extract standardized to 80% silymarin. A healthy liver is essential for good digestion and for purifying the blood. The liver is stressed by exposure to alcohol, chemicals, cosmetics, tobacco, air pollution and water pollution.