Gaia Milk Thistle Seed, provides Certified Organic Milk Thistle (Silybum marianum); an herb traditionally used for maintaining healthy liver function. Milk Thistle Seed Liquid is a great formula to help you stay feeling well for the long-term. Gaia's Certified Organic Milk Thistle Seed is extracted under low temperature and low pressure to preserve the important phytochemical Silymarin - believed to have antioxidant effects to help maintain healthy liver cells. Gaia Milk Thistle Seed is a great formula to help you stay feeling well.