Every bottle contains the oil of thousands of Perfectly Pressed organic seeds. This unique pressing process ensures that there is no damage to the oil. The finished product is stored in UV-protective Miron glass bottles to maintain quality over time. Zero damage equals zero rancidity. Milk Thistle oil benefits include: Liver protection and regeneration, antioxidant protection, hormones balancing, brain protection, skin protection, cholesterol regulation, heartburn treatment and more.