* Herbal Actives * 250 mg/80% Silymarin * Standardized Botanical Supplement * Maximum Potency Guaranteed * Prescription Quality * Gluten Free Nutritional Support for Healthy Liver Function. Each Herbal Actives Milk Thistle capsule, providing the greatest concentration of active botanical principles, maximizes the synergistic benefits of the whole seed, which naturally contains silybin, silydianin and silychristin. Guaranteed Maximum Potency: Each Herbal Actives formula is scientifically standardized to the highest level of active principles. HerbaShield: An exclusive purity and safety system including light-resistant bottle, airtight inner seal, moisture-absorbing packet, tamper-evident safety cap and tamper-proof full bottle seal.